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ramips: mt7621: backport PCIe driver fixes from staging-test 

Backport mt7621-pci/mt7621-pci-phy fixes from staging-test

Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
This commit is contained in:
DENG Qingfang 2020-03-11 21:05:41 +08:00 committed by Chuanhong Guo
parent 66984646c2
commit d21d6ea454
20 changed files with 1730 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

133
target/linux/ramips/patches-5.4/0100-staging-mt7621-pci-simplify-mt7621_pcie_init_virtual.patch Normal file
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@ -0,0 +1,133 @@
From b327cd58c3fec1c6382128e929eab9bc0d68e912 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Sun, 8 Mar 2020 10:19:27 +0100
Subject: [PATCH] staging: mt7621-pci: simplify
'mt7621_pcie_init_virtual_bridges' function
Function 'mt7621_pcie_init_virtual_bridges' is a bit mess and can be
refactorized properly in a cleaner way. Introduce new 'pcie_rmw' inline
function helper to do clear and set the correct bits this function needs
to work.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200308091928.17177-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 85 +++++++++++++--------------------
1 file changed, 33 insertions(+), 52 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -57,13 +57,13 @@
#define RALINK_PCI_IOBASE 0x002C
/* PCICFG virtual bridges */
-#define MT7621_BR0_MASK GENMASK(19, 16)
-#define MT7621_BR1_MASK GENMASK(23, 20)
-#define MT7621_BR2_MASK GENMASK(27, 24)
-#define MT7621_BR_ALL_MASK GENMASK(27, 16)
-#define MT7621_BR0_SHIFT 16
-#define MT7621_BR1_SHIFT 20
-#define MT7621_BR2_SHIFT 24
+#define PCIE_P2P_MAX 3
+#define PCIE_P2P_BR_DEVNUM_SHIFT(p) (16 + (p) * 4)
+#define PCIE_P2P_BR_DEVNUM0_SHIFT PCIE_P2P_BR_DEVNUM_SHIFT(0)
+#define PCIE_P2P_BR_DEVNUM1_SHIFT PCIE_P2P_BR_DEVNUM_SHIFT(1)
+#define PCIE_P2P_BR_DEVNUM2_SHIFT PCIE_P2P_BR_DEVNUM_SHIFT(2)
+#define PCIE_P2P_BR_DEVNUM_MASK 0xf
+#define PCIE_P2P_BR_DEVNUM_MASK_FULL (0xfff << PCIE_P2P_BR_DEVNUM0_SHIFT)
/* PCIe RC control registers */
#define MT7621_PCIE_OFFSET 0x2000
@@ -154,6 +154,15 @@ static inline void pcie_write(struct mt7
writel(val, pcie->base + reg);
}
+static inline void pcie_rmw(struct mt7621_pcie *pcie, u32 reg, u32 clr, u32 set)
+{
+ u32 val = readl(pcie->base + reg);
+
+ val &= ~clr;
+ val |= set;
+ writel(val, pcie->base + reg);
+}
+
static inline u32 pcie_port_read(struct mt7621_pcie_port *port, u32 reg)
{
return readl(port->base + reg);
@@ -554,7 +563,9 @@ static void mt7621_pcie_enable_ports(str
static int mt7621_pcie_init_virtual_bridges(struct mt7621_pcie *pcie)
{
u32 pcie_link_status = 0;
- u32 val = 0;
+ u32 n;
+ int i;
+ u32 p2p_br_devnum[PCIE_P2P_MAX];
struct mt7621_pcie_port *port;
list_for_each_entry(port, &pcie->ports, list) {
@@ -567,50 +578,20 @@ static int mt7621_pcie_init_virtual_brid
if (pcie_link_status == 0)
return -1;
- /*
- * pcie(2/1/0) link status pcie2_num pcie1_num pcie0_num
- * 3'b000 x x x
- * 3'b001 x x 0
- * 3'b010 x 0 x
- * 3'b011 x 1 0
- * 3'b100 0 x x
- * 3'b101 1 x 0
- * 3'b110 1 0 x
- * 3'b111 2 1 0
- */
- switch (pcie_link_status) {
- case 2:
- val = pcie_read(pcie, RALINK_PCI_PCICFG_ADDR);
- val &= ~(MT7621_BR0_MASK | MT7621_BR1_MASK);
- val |= 0x1 << MT7621_BR0_SHIFT;
- val |= 0x0 << MT7621_BR1_SHIFT;
- pcie_write(pcie, val, RALINK_PCI_PCICFG_ADDR);
- break;
- case 4:
- val = pcie_read(pcie, RALINK_PCI_PCICFG_ADDR);
- val &= ~MT7621_BR_ALL_MASK;
- val |= 0x1 << MT7621_BR0_SHIFT;
- val |= 0x2 << MT7621_BR1_SHIFT;
- val |= 0x0 << MT7621_BR2_SHIFT;
- pcie_write(pcie, val, RALINK_PCI_PCICFG_ADDR);
- break;
- case 5:
- val = pcie_read(pcie, RALINK_PCI_PCICFG_ADDR);
- val &= ~MT7621_BR_ALL_MASK;
- val |= 0x0 << MT7621_BR0_SHIFT;
- val |= 0x2 << MT7621_BR1_SHIFT;
- val |= 0x1 << MT7621_BR2_SHIFT;
- pcie_write(pcie, val, RALINK_PCI_PCICFG_ADDR);
- break;
- case 6:
- val = pcie_read(pcie, RALINK_PCI_PCICFG_ADDR);
- val &= ~MT7621_BR_ALL_MASK;
- val |= 0x2 << MT7621_BR0_SHIFT;
- val |= 0x0 << MT7621_BR1_SHIFT;
- val |= 0x1 << MT7621_BR2_SHIFT;
- pcie_write(pcie, val, RALINK_PCI_PCICFG_ADDR);
- break;
- }
+ n = 0;
+ for (i = 0; i < PCIE_P2P_MAX; i++)
+ if (pcie_link_status & BIT(i))
+ p2p_br_devnum[i] = n++;
+
+ for (i = 0; i < PCIE_P2P_MAX; i++)
+ if ((pcie_link_status & BIT(i)) == 0)
+ p2p_br_devnum[i] = n++;
+
+ pcie_rmw(pcie, RALINK_PCI_CONFIG_ADDR,
+ PCIE_P2P_BR_DEVNUM_MASK_FULL,
+ (p2p_br_devnum[0] << PCIE_P2P_BR_DEVNUM0_SHIFT) |
+ (p2p_br_devnum[1] << PCIE_P2P_BR_DEVNUM1_SHIFT) |
+ (p2p_br_devnum[2] << PCIE_P2P_BR_DEVNUM2_SHIFT));
return 0;
}

74
target/linux/ramips/patches-5.4/0101-staging-mt7621-pci-enable-clock-bit-for-each-port.patch Normal file
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@ -0,0 +1,74 @@
From 550fabd71d7fcdfe099bbf41e00e28719737161e Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Tue, 10 Mar 2020 12:34:59 +0100
Subject: [PATCH] staging: mt7621-pci: enable clock bit for each port
The clock related code concerns me from the very beginning because
there are some set ups got from legacy driver that are not documented
anywhere. According to the programming guide 0x7c is 'CPE_ROSC_SEL1'
register and 0x80 is 'CPU_CPE_CN'. I do think this set up is not needed
at all and the proper thing to do is just enable the clock bit for each
pcie port. Hence remove useless code and do the right thing which is
setting up the clock bit for each port enabled.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200310113459.30539-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -45,8 +45,6 @@
/* rt_sysc_membase relative registers */
#define RALINK_CLKCFG1 0x30
-#define RALINK_PCIE_CLK_GEN 0x7c
-#define RALINK_PCIE_CLK_GEN1 0x80
/* Host-PCI bridge registers */
#define RALINK_PCI_PCICFG_ADDR 0x0000
@@ -85,10 +83,6 @@
#define PCIE_PORT_CLK_EN(x) BIT(24 + (x))
#define PCIE_PORT_LINKUP BIT(0)
-#define PCIE_CLK_GEN_EN BIT(31)
-#define PCIE_CLK_GEN_DIS 0
-#define PCIE_CLK_GEN1_DIS GENMASK(30, 24)
-#define PCIE_CLK_GEN1_EN (BIT(27) | BIT(25))
#define MEMORY_BASE 0x0
#define PERST_MODE_MASK GENMASK(11, 10)
#define PERST_MODE_GPIO BIT(10)
@@ -233,6 +227,11 @@ static inline bool mt7621_pcie_port_is_l
return (pcie_port_read(port, RALINK_PCI_STATUS) & PCIE_PORT_LINKUP) != 0;
}
+static inline void mt7621_pcie_port_clk_enable(struct mt7621_pcie_port *port)
+{
+ rt_sysc_m32(0, PCIE_PORT_CLK_EN(port->slot), RALINK_CLKCFG1);
+}
+
static inline void mt7621_pcie_port_clk_disable(struct mt7621_pcie_port *port)
{
rt_sysc_m32(PCIE_PORT_CLK_EN(port->slot), 0, RALINK_CLKCFG1);
@@ -501,11 +500,6 @@ static void mt7621_pcie_init_ports(struc
}
}
- rt_sysc_m32(0x30, 2 << 4, SYSC_REG_SYSTEM_CONFIG1);
- rt_sysc_m32(PCIE_CLK_GEN_EN, PCIE_CLK_GEN_DIS, RALINK_PCIE_CLK_GEN);
- rt_sysc_m32(PCIE_CLK_GEN1_DIS, PCIE_CLK_GEN1_EN, RALINK_PCIE_CLK_GEN1);
- rt_sysc_m32(PCIE_CLK_GEN_DIS, PCIE_CLK_GEN_EN, RALINK_PCIE_CLK_GEN);
- msleep(50);
reset_control_deassert(pcie->rst);
}
@@ -542,6 +536,7 @@ static void mt7621_pcie_enable_ports(str
list_for_each_entry(port, &pcie->ports, list) {
if (port->enabled) {
+ mt7621_pcie_port_clk_enable(port);
mt7621_pcie_enable_port(port);
dev_info(dev, "PCIE%d enabled\n", num_slots_enabled);
num_slots_enabled++;

222
target/linux/ramips/patches-5.4/0102-staging-mt7621-pci-use-gpios-for-properly-reset.patch Normal file
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@ -0,0 +1,222 @@
From 227a8bf421ff8b085444e51e471ef06a87228cfd Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 13 Mar 2020 21:09:08 +0100
Subject: [PATCH] staging: mt7621-pci: use gpios for properly reset
Original driver code was using three gpio's for reset
asserts and deasserts the pcis. Instead of using that
a general reset control with a perst gpio was introduced
and it seems it is partially working but sometimes there
are some unexpected hangs on boot. This commit make use of
the three original gpios using 'reset-gpios' property of
the device tree and removes the reset line and perst gpio.
According to the mediatek aplication note v0.1 there are
three gpios used for pcie ports reset control: gpio#19,
gpio#8 and gpio#7 for slots 0, 1 and 2 respectively.
This schema can be used separately for mt7621A but in some
boards due to pin share issue, if the PCM and I2S function
are enable at the same time, there are no enough GPIO to
control per-port PCIe reset. In those cases gpio#19 is enought
for reset the three ports together. Because of this we just
try to get the three gpios but if some of them fail we are not
failing in boot process, just prints a kernel notice and take
after into account if the descriptor is or not valid in order
to use it. All of them are set as GPIO output low configuration.
The gpio descriptor's API takes device tree property into account
and invert value if the pin is configured as active low.
So we also have to properly request pins from device tree
and set values correct in assert and deassert functions.
After this changes the order to make all assert and
deassert in the 'probe' process makes more sense:
* Parse device tree.
* make assert of the RC's and EP's before doing anything else.
* make deassert of the RC's before initializing the phy.
* Init the phy.
* make deassert of the EP's before initialize pci ports.
* Normal PCI initialization.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200313200913.24321-2-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 84 ++++++++++++++++++++-------------
1 file changed, 51 insertions(+), 33 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -95,6 +95,7 @@
* @pcie: pointer to PCIe host info
* @phy: pointer to PHY control block
* @pcie_rst: pointer to port reset control
+ * @gpio_rst: gpio reset
* @slot: port slot
* @enabled: indicates if port is enabled
*/
@@ -104,6 +105,7 @@ struct mt7621_pcie_port {
struct mt7621_pcie *pcie;
struct phy *phy;
struct reset_control *pcie_rst;
+ struct gpio_desc *gpio_rst;
u32 slot;
bool enabled;
};
@@ -117,8 +119,6 @@ struct mt7621_pcie_port {
* @offset: IO / Memory offset
* @dev: Pointer to PCIe device
* @ports: pointer to PCIe port information
- * @perst: gpio reset
- * @rst: pointer to pcie reset
* @resets_inverted: depends on chip revision
* reset lines are inverted.
*/
@@ -133,8 +133,6 @@ struct mt7621_pcie {
resource_size_t io;
} offset;
struct list_head ports;
- struct gpio_desc *perst;
- struct reset_control *rst;
bool resets_inverted;
};
@@ -210,16 +208,16 @@ static void write_config(struct mt7621_p
pcie_write(pcie, val, RALINK_PCI_CONFIG_DATA);
}
-static inline void mt7621_perst_gpio_pcie_assert(struct mt7621_pcie *pcie)
+static inline void mt7621_rst_gpio_pcie_assert(struct mt7621_pcie_port *port)
{
- gpiod_set_value(pcie->perst, 0);
- mdelay(PERST_DELAY_US);
+ if (port->gpio_rst)
+ gpiod_set_value(port->gpio_rst, 1);
}
-static inline void mt7621_perst_gpio_pcie_deassert(struct mt7621_pcie *pcie)
+static inline void mt7621_rst_gpio_pcie_deassert(struct mt7621_pcie_port *port)
{
- gpiod_set_value(pcie->perst, 1);
- mdelay(PERST_DELAY_US);
+ if (port->gpio_rst)
+ gpiod_set_value(port->gpio_rst, 0);
}
static inline bool mt7621_pcie_port_is_linkup(struct mt7621_pcie_port *port)
@@ -367,6 +365,13 @@ static int mt7621_pcie_parse_port(struct
if (IS_ERR(port->phy))
return PTR_ERR(port->phy);
+ port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(port->gpio_rst)) {
+ dev_err(dev, "Failed to get GPIO for PCIe%d\n", slot);
+ return PTR_ERR(port->gpio_rst);
+ }
+
port->slot = slot;
port->pcie = pcie;
@@ -383,12 +388,6 @@ static int mt7621_pcie_parse_dt(struct m
struct resource regs;
int err;
- pcie->perst = devm_gpiod_get(dev, "perst", GPIOD_OUT_HIGH);
- if (IS_ERR(pcie->perst)) {
- dev_err(dev, "failed to get gpio perst\n");
- return PTR_ERR(pcie->perst);
- }
-
err = of_address_to_resource(node, 0, &regs);
if (err) {
dev_err(dev, "missing \"reg\" property\n");
@@ -399,12 +398,6 @@ static int mt7621_pcie_parse_dt(struct m
if (IS_ERR(pcie->base))
return PTR_ERR(pcie->base);
- pcie->rst = devm_reset_control_get_exclusive(dev, "pcie");
- if (PTR_ERR(pcie->rst) == -EPROBE_DEFER) {
- dev_err(dev, "failed to get pcie reset control\n");
- return PTR_ERR(pcie->rst);
- }
-
for_each_available_child_of_node(node, child) {
int slot;
@@ -458,16 +451,49 @@ static int mt7621_pcie_init_port(struct
return 0;
}
+static void mt7621_pcie_reset_assert(struct mt7621_pcie *pcie)
+{
+ struct mt7621_pcie_port *port;
+
+ list_for_each_entry(port, &pcie->ports, list) {
+ /* PCIe RC reset assert */
+ mt7621_control_assert(port);
+
+ /* PCIe EP reset assert */
+ mt7621_rst_gpio_pcie_assert(port);
+ }
+
+ mdelay(PERST_DELAY_US);
+}
+
+static void mt7621_pcie_reset_rc_deassert(struct mt7621_pcie *pcie)
+{
+ struct mt7621_pcie_port *port;
+
+ list_for_each_entry(port, &pcie->ports, list)
+ mt7621_control_deassert(port);
+}
+
+static void mt7621_pcie_reset_ep_deassert(struct mt7621_pcie *pcie)
+{
+ struct mt7621_pcie_port *port;
+
+ list_for_each_entry(port, &pcie->ports, list)
+ mt7621_rst_gpio_pcie_deassert(port);
+
+ mdelay(PERST_DELAY_US);
+}
+
static void mt7621_pcie_init_ports(struct mt7621_pcie *pcie)
{
struct device *dev = pcie->dev;
struct mt7621_pcie_port *port, *tmp;
- u32 val = 0;
int err;
rt_sysc_m32(PERST_MODE_MASK, PERST_MODE_GPIO, MT7621_GPIO_MODE);
- mt7621_perst_gpio_pcie_assert(pcie);
+ mt7621_pcie_reset_assert(pcie);
+ mt7621_pcie_reset_rc_deassert(pcie);
list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
u32 slot = port->slot;
@@ -476,16 +502,10 @@ static void mt7621_pcie_init_ports(struc
if (err) {
dev_err(dev, "Initiating port %d failed\n", slot);
list_del(&port->list);
- } else {
- val = read_config(pcie, slot, PCIE_FTS_NUM);
- dev_info(dev, "Port %d N_FTS = %x\n", slot,
- (unsigned int)val);
}
}
- reset_control_assert(pcie->rst);
-
- mt7621_perst_gpio_pcie_deassert(pcie);
+ mt7621_pcie_reset_ep_deassert(pcie);
list_for_each_entry(port, &pcie->ports, list) {
u32 slot = port->slot;
@@ -499,8 +519,6 @@ static void mt7621_pcie_init_ports(struc
port->enabled = false;
}
}
-
- reset_control_deassert(pcie->rst);
}
static void mt7621_pcie_enable_port(struct mt7621_pcie_port *port)

45
target/linux/ramips/patches-5.4/0103-staging-mt7621-pci-change-value-for-PERST_DELAY_MS.patch Normal file
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@ -0,0 +1,45 @@
From e462e7d3211479df42357a620fa788a2257556b7 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 13 Mar 2020 21:09:09 +0100
Subject: [PATCH] staging: mt7621-pci: change value for 'PERST_DELAY_MS'
Value of 'PERST_DELAY_MS' is too high and it is ok just
to set up to 100 ms. Update also define name from
'PERST_DELAY_US' into 'PERST_DELAY_MS'
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200313200913.24321-3-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -86,7 +86,7 @@
#define MEMORY_BASE 0x0
#define PERST_MODE_MASK GENMASK(11, 10)
#define PERST_MODE_GPIO BIT(10)
-#define PERST_DELAY_US 1000
+#define PERST_DELAY_MS 100
/**
* struct mt7621_pcie_port - PCIe port information
@@ -463,7 +463,7 @@ static void mt7621_pcie_reset_assert(str
mt7621_rst_gpio_pcie_assert(port);
}
- mdelay(PERST_DELAY_US);
+ mdelay(PERST_DELAY_MS);
}
static void mt7621_pcie_reset_rc_deassert(struct mt7621_pcie *pcie)
@@ -481,7 +481,7 @@ static void mt7621_pcie_reset_ep_deasser
list_for_each_entry(port, &pcie->ports, list)
mt7621_rst_gpio_pcie_deassert(port);
- mdelay(PERST_DELAY_US);
+ mdelay(PERST_DELAY_MS);
}
static void mt7621_pcie_init_ports(struct mt7621_pcie *pcie)

76
target/linux/ramips/patches-5.4/0104-staging-mt7621-pci-release-gpios-after-pci-initializ.patch Normal file
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@ -0,0 +1,76 @@
From 4d6a758f2cd2122a7d895f913854c13da62ba6df Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 13 Mar 2020 21:09:12 +0100
Subject: [PATCH] staging: mt7621-pci: release gpios after pci initialization
R3G's LEDs fail to initialize because one of them uses GPIO8
Hence, release the GPIO resources after PCIe initialization
and properly release also in driver error path.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200313200913.24321-6-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -484,6 +484,15 @@ static void mt7621_pcie_reset_ep_deasser
mdelay(PERST_DELAY_MS);
}
+static void mt7621_pcie_release_gpios(struct mt7621_pcie *pcie)
+{
+ struct mt7621_pcie_port *port;
+
+ list_for_each_entry(port, &pcie->ports, list)
+ if (port->gpio_rst)
+ gpiod_put(port->gpio_rst);
+}
+
static void mt7621_pcie_init_ports(struct mt7621_pcie *pcie)
{
struct device *dev = pcie->dev;
@@ -683,7 +692,8 @@ static int mt7621_pci_probe(struct platf
err = mt7621_pcie_init_virtual_bridges(pcie);
if (err) {
dev_err(dev, "Nothing is connected in virtual bridges. Exiting...");
- return 0;
+ err = 0;
+ goto out_release_gpios;
}
mt7621_pcie_enable_ports(pcie);
@@ -691,7 +701,7 @@ static int mt7621_pci_probe(struct platf
err = mt7621_pci_parse_request_of_pci_ranges(pcie);
if (err) {
dev_err(dev, "Error requesting pci resources from ranges");
- return err;
+ goto out_release_gpios;
}
setup_cm_memory_region(pcie);
@@ -699,16 +709,19 @@ static int mt7621_pci_probe(struct platf
err = mt7621_pcie_request_resources(pcie, &res);
if (err) {
dev_err(dev, "Error requesting resources\n");
- return err;
+ goto out_release_gpios;
}
err = mt7621_pcie_register_host(bridge, &res);
if (err) {
dev_err(dev, "Error registering host\n");
- return err;
+ goto out_release_gpios;
}
- return 0;
+out_release_gpios:
+ mt7621_pcie_release_gpios(pcie);
+
+ return err;
}
static const struct of_device_id mt7621_pci_ids[] = {

46
target/linux/ramips/patches-5.4/0105-staging-mt7621-pci-delete-no-more-needed-mt7621_rese.patch Normal file
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@ -0,0 +1,46 @@
From 4be54c3a495f08c05a8e485566e5b88cd3537f16 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 13 Mar 2020 21:09:13 +0100
Subject: [PATCH] staging: mt7621-pci: delete no more needed
'mt7621_reset_port'
After review all the resets at the beggining the function
'mt7621_reset_port' is not needed anymore. Hence delete it
and its uses.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200313200913.24321-7-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 13 -------------
1 file changed, 13 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -255,13 +255,6 @@ static inline void mt7621_control_deasse
reset_control_assert(port->pcie_rst);
}
-static void mt7621_reset_port(struct mt7621_pcie_port *port)
-{
- mt7621_control_assert(port);
- msleep(100);
- mt7621_control_deassert(port);
-}
-
static void setup_cm_memory_region(struct mt7621_pcie *pcie)
{
struct resource *mem_resource = &pcie->mem;
@@ -427,12 +420,6 @@ static int mt7621_pcie_init_port(struct
u32 slot = port->slot;
int err;
- /*
- * Any MT7621 Ralink pcie controller that doesn't have 0x0101 at
- * the end of the chip_id has inverted PCI resets.
- */
- mt7621_reset_port(port);
-
err = phy_init(port->phy);
if (err) {
dev_err(dev, "failed to initialize port%d phy\n", slot);

234
target/linux/ramips/patches-5.4/0106-staging-mt7621-pci-phy-add-mt7621_phy_rmw-to-simplif.patch Normal file
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@ -0,0 +1,234 @@
From bf0c6782e5b9a6deee4e223655325dc004fae8dd Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Sun, 15 Mar 2020 17:01:54 +0100
Subject: [PATCH] staging: mt7621-pci-phy: add 'mt7621_phy_rmw' to simplify
code
In order to simplify driver code and decrease a bit LOC add new
function 'mt7621_phy_rmw' where clear and set bits are passed as
arguments.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200315160154.10292-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c | 158 +++++++++++-------------
1 file changed, 71 insertions(+), 87 deletions(-)
--- a/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c
+++ b/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c
@@ -120,17 +120,25 @@ static inline void phy_write(struct mt76
regmap_write(phy->regmap, reg, val);
}
+static inline void mt7621_phy_rmw(struct mt7621_pci_phy *phy,
+ u32 reg, u32 clr, u32 set)
+{
+ u32 val = phy_read(phy, reg);
+
+ val &= ~clr;
+ val |= set;
+ phy_write(phy, val, reg);
+}
+
static void mt7621_bypass_pipe_rst(struct mt7621_pci_phy *phy,
struct mt7621_pci_phy_instance *instance)
{
u32 offset = (instance->index != 1) ?
RG_PE1_PIPE_REG : RG_PE1_PIPE_REG + RG_P0_TO_P1_WIDTH;
- u32 reg;
- reg = phy_read(phy, offset);
- reg &= ~(RG_PE1_PIPE_RST | RG_PE1_PIPE_CMD_FRC);
- reg |= (RG_PE1_PIPE_RST | RG_PE1_PIPE_CMD_FRC);
- phy_write(phy, reg, offset);
+ mt7621_phy_rmw(phy, offset,
+ RG_PE1_PIPE_RST | RG_PE1_PIPE_CMD_FRC,
+ RG_PE1_PIPE_RST | RG_PE1_PIPE_CMD_FRC);
}
static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy,
@@ -139,97 +147,77 @@ static void mt7621_set_phy_for_ssc(struc
struct device *dev = phy->dev;
u32 reg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0);
u32 offset;
- u32 val;
reg = (reg >> 6) & 0x7;
/* Set PCIe Port PHY to disable SSC */
/* Debug Xtal Type */
- val = phy_read(phy, RG_PE1_FRC_H_XTAL_REG);
- val &= ~(RG_PE1_FRC_H_XTAL_TYPE | RG_PE1_H_XTAL_TYPE);
- val |= RG_PE1_FRC_H_XTAL_TYPE;
- val |= RG_PE1_H_XTAL_TYPE_VAL(0x00);
- phy_write(phy, val, RG_PE1_FRC_H_XTAL_REG);
+ mt7621_phy_rmw(phy, RG_PE1_FRC_H_XTAL_REG,
+ RG_PE1_FRC_H_XTAL_TYPE | RG_PE1_H_XTAL_TYPE,
+ RG_PE1_FRC_H_XTAL_TYPE | RG_PE1_H_XTAL_TYPE_VAL(0x00));
/* disable port */
offset = (instance->index != 1) ?
RG_PE1_FRC_PHY_REG : RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH;
- val = phy_read(phy, offset);
- val &= ~(RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN);
- val |= RG_PE1_FRC_PHY_EN;
- phy_write(phy, val, offset);
-
- /* Set Pre-divider ratio (for host mode) */
- val = phy_read(phy, RG_PE1_H_PLL_REG);
- val &= ~(RG_PE1_H_PLL_PREDIV);
+ mt7621_phy_rmw(phy, offset,
+ RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN, RG_PE1_FRC_PHY_EN);
if (reg <= 5 && reg >= 3) { /* 40MHz Xtal */
- val |= RG_PE1_H_PLL_PREDIV_VAL(0x01);
- phy_write(phy, val, RG_PE1_H_PLL_REG);
+ /* Set Pre-divider ratio (for host mode) */
+ mt7621_phy_rmw(phy, RG_PE1_H_PLL_REG,
+ RG_PE1_H_PLL_PREDIV,
+ RG_PE1_H_PLL_PREDIV_VAL(0x01));
dev_info(dev, "Xtal is 40MHz\n");
- } else { /* 25MHz | 20MHz Xtal */
- val |= RG_PE1_H_PLL_PREDIV_VAL(0x00);
- phy_write(phy, val, RG_PE1_H_PLL_REG);
- if (reg >= 6) {
- dev_info(dev, "Xtal is 25MHz\n");
-
- /* Select feedback clock */
- val = phy_read(phy, RG_PE1_H_PLL_FBKSEL_REG);
- val &= ~(RG_PE1_H_PLL_FBKSEL);
- val |= RG_PE1_H_PLL_FBKSEL_VAL(0x01);
- phy_write(phy, val, RG_PE1_H_PLL_FBKSEL_REG);
-
- /* DDS NCPO PCW (for host mode) */
- val = phy_read(phy, RG_PE1_H_LCDDS_SSC_PRD_REG);
- val &= ~(RG_PE1_H_LCDDS_SSC_PRD);
- val |= RG_PE1_H_LCDDS_SSC_PRD_VAL(0x18000000);
- phy_write(phy, val, RG_PE1_H_LCDDS_SSC_PRD_REG);
-
- /* DDS SSC dither period control */
- val = phy_read(phy, RG_PE1_H_LCDDS_SSC_PRD_REG);
- val &= ~(RG_PE1_H_LCDDS_SSC_PRD);
- val |= RG_PE1_H_LCDDS_SSC_PRD_VAL(0x18d);
- phy_write(phy, val, RG_PE1_H_LCDDS_SSC_PRD_REG);
-
- /* DDS SSC dither amplitude control */
- val = phy_read(phy, RG_PE1_H_LCDDS_SSC_DELTA_REG);
- val &= ~(RG_PE1_H_LCDDS_SSC_DELTA |
- RG_PE1_H_LCDDS_SSC_DELTA1);
- val |= RG_PE1_H_LCDDS_SSC_DELTA_VAL(0x4a);
- val |= RG_PE1_H_LCDDS_SSC_DELTA1_VAL(0x4a);
- phy_write(phy, val, RG_PE1_H_LCDDS_SSC_DELTA_REG);
- } else {
- dev_info(dev, "Xtal is 20MHz\n");
- }
+ } else if (reg >= 6) { /* 25MHz Xal */
+ mt7621_phy_rmw(phy, RG_PE1_H_PLL_REG,
+ RG_PE1_H_PLL_PREDIV,
+ RG_PE1_H_PLL_PREDIV_VAL(0x00));
+ /* Select feedback clock */
+ mt7621_phy_rmw(phy, RG_PE1_H_PLL_FBKSEL_REG,
+ RG_PE1_H_PLL_FBKSEL,
+ RG_PE1_H_PLL_FBKSEL_VAL(0x01));
+ /* DDS NCPO PCW (for host mode) */
+ mt7621_phy_rmw(phy, RG_PE1_H_LCDDS_SSC_PRD_REG,
+ RG_PE1_H_LCDDS_SSC_PRD,
+ RG_PE1_H_LCDDS_SSC_PRD_VAL(0x18000000));
+ /* DDS SSC dither period control */
+ mt7621_phy_rmw(phy, RG_PE1_H_LCDDS_SSC_PRD_REG,
+ RG_PE1_H_LCDDS_SSC_PRD,
+ RG_PE1_H_LCDDS_SSC_PRD_VAL(0x18d));
+ /* DDS SSC dither amplitude control */
+ mt7621_phy_rmw(phy, RG_PE1_H_LCDDS_SSC_DELTA_REG,
+ RG_PE1_H_LCDDS_SSC_DELTA |
+ RG_PE1_H_LCDDS_SSC_DELTA1,
+ RG_PE1_H_LCDDS_SSC_DELTA_VAL(0x4a) |
+ RG_PE1_H_LCDDS_SSC_DELTA1_VAL(0x4a));
+ dev_info(dev, "Xtal is 25MHz\n");
+ } else { /* 20MHz Xtal */
+ mt7621_phy_rmw(phy, RG_PE1_H_PLL_REG,
+ RG_PE1_H_PLL_PREDIV,
+ RG_PE1_H_PLL_PREDIV_VAL(0x00));
+
+ dev_info(dev, "Xtal is 20MHz\n");
}
/* DDS clock inversion */
- val = phy_read(phy, RG_PE1_LCDDS_CLK_PH_INV_REG);
- val &= ~(RG_PE1_LCDDS_CLK_PH_INV);
- val |= RG_PE1_LCDDS_CLK_PH_INV;
- phy_write(phy, val, RG_PE1_LCDDS_CLK_PH_INV_REG);
+ mt7621_phy_rmw(phy, RG_PE1_LCDDS_CLK_PH_INV_REG,
+ RG_PE1_LCDDS_CLK_PH_INV, RG_PE1_LCDDS_CLK_PH_INV);
/* Set PLL bits */
- val = phy_read(phy, RG_PE1_H_PLL_REG);
- val &= ~(RG_PE1_H_PLL_BC | RG_PE1_H_PLL_BP | RG_PE1_H_PLL_IR |
- RG_PE1_H_PLL_IC | RG_PE1_PLL_DIVEN);
- val |= RG_PE1_H_PLL_BC_VAL(0x02);
- val |= RG_PE1_H_PLL_BP_VAL(0x06);
- val |= RG_PE1_H_PLL_IR_VAL(0x02);
- val |= RG_PE1_H_PLL_IC_VAL(0x01);
- val |= RG_PE1_PLL_DIVEN_VAL(0x02);
- phy_write(phy, val, RG_PE1_H_PLL_REG);
-
- val = phy_read(phy, RG_PE1_H_PLL_BR_REG);
- val &= ~(RG_PE1_H_PLL_BR);
- val |= RG_PE1_H_PLL_BR_VAL(0x00);
- phy_write(phy, val, RG_PE1_H_PLL_BR_REG);
+ mt7621_phy_rmw(phy, RG_PE1_H_PLL_REG,
+ RG_PE1_H_PLL_BC | RG_PE1_H_PLL_BP | RG_PE1_H_PLL_IR |
+ RG_PE1_H_PLL_IC | RG_PE1_PLL_DIVEN,
+ RG_PE1_H_PLL_BC_VAL(0x02) | RG_PE1_H_PLL_BP_VAL(0x06) |
+ RG_PE1_H_PLL_IR_VAL(0x02) | RG_PE1_H_PLL_IC_VAL(0x01) |
+ RG_PE1_PLL_DIVEN_VAL(0x02));
+
+ mt7621_phy_rmw(phy, RG_PE1_H_PLL_BR_REG,
+ RG_PE1_H_PLL_BR, RG_PE1_H_PLL_BR_VAL(0x00));
if (reg <= 5 && reg >= 3) { /* 40MHz Xtal */
/* set force mode enable of da_pe1_mstckdiv */
- val = phy_read(phy, RG_PE1_MSTCKDIV_REG);
- val &= ~(RG_PE1_MSTCKDIV | RG_PE1_FRC_MSTCKDIV);
- val |= (RG_PE1_MSTCKDIV_VAL(0x01) | RG_PE1_FRC_MSTCKDIV);
- phy_write(phy, val, RG_PE1_MSTCKDIV_REG);
+ mt7621_phy_rmw(phy, RG_PE1_MSTCKDIV_REG,
+ RG_PE1_MSTCKDIV | RG_PE1_FRC_MSTCKDIV,
+ RG_PE1_MSTCKDIV_VAL(0x01) | RG_PE1_FRC_MSTCKDIV);
}
}
@@ -252,13 +240,11 @@ static int mt7621_pci_phy_power_on(struc
struct mt7621_pci_phy *mphy = dev_get_drvdata(phy->dev.parent);
u32 offset = (instance->index != 1) ?
RG_PE1_FRC_PHY_REG : RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH;
- u32 val;
/* Enable PHY and disable force mode */
- val = phy_read(mphy, offset);
- val &= ~(RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN);
- val |= (RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN);
- phy_write(mphy, val, offset);
+ mt7621_phy_rmw(mphy, offset,
+ RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN,
+ RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN);
return 0;
}
@@ -269,13 +255,11 @@ static int mt7621_pci_phy_power_off(stru
struct mt7621_pci_phy *mphy = dev_get_drvdata(phy->dev.parent);
u32 offset = (instance->index != 1) ?
RG_PE1_FRC_PHY_REG : RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH;
- u32 val;
/* Disable PHY */
- val = phy_read(mphy, offset);
- val &= ~(RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN);
- val |= RG_PE1_FRC_PHY_EN;
- phy_write(mphy, val, offset);
+ mt7621_phy_rmw(mphy, offset,
+ RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN,
+ RG_PE1_FRC_PHY_EN);
return 0;
}

131
target/linux/ramips/patches-5.4/0107-staging-mt7621-pci-fix-io-space-and-properly-set-res.patch Normal file
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@ -0,0 +1,131 @@
From 3faf4e1c537de86058fc22a851cd979489b9185e Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Wed, 18 Mar 2020 10:44:45 +0100
Subject: [PATCH] staging: mt7621-pci: fix io space and properly set resource
limits
Function 'mt7621_pci_parse_request_of_pci_ranges' is using
'of_pci_range_to_resource' to get both mem and io resources.
Internally this function calls to 'pci_address_to_pio' which
returns -1 if io space address is an address > IO_SPACE_LIMIT
which is 0xFFFF for mips. This mt7621 soc has io space in physical
address 0x1e160000. In order to fix this, overwrite invalid io
0xffffffff with properly values from the device tree and set
mapped address of this resource as io port base memory address
calling 'set_io_port_base' function. There is also need to properly
setup resource limits and io and memory windows with properly
parsed values instead of set them as 'no limit' which it is wrong.
For any reason I don't really know legacy driver sets up mem window
as 0xFFFFFFFF and any other value seems to does not work as expected,
so set up also here with same values.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200318094445.19669-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 43 +++++++++++++++++++--------------
1 file changed, 25 insertions(+), 18 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -118,6 +118,7 @@ struct mt7621_pcie_port {
* @busn: bus range
* @offset: IO / Memory offset
* @dev: Pointer to PCIe device
+ * @io_map_base: virtual memory base address for io
* @ports: pointer to PCIe port information
* @resets_inverted: depends on chip revision
* reset lines are inverted.
@@ -132,6 +133,7 @@ struct mt7621_pcie {
resource_size_t mem;
resource_size_t io;
} offset;
+ unsigned long io_map_base;
struct list_head ports;
bool resets_inverted;
};
@@ -291,22 +293,21 @@ static int mt7621_pci_parse_request_of_p
}
for_each_of_pci_range(&parser, &range) {
- struct resource *res = NULL;
-
switch (range.flags & IORESOURCE_TYPE_BITS) {
case IORESOURCE_IO:
- ioremap(range.cpu_addr, range.size);
- res = &pcie->io;
+ pcie->io_map_base =
+ (unsigned long)ioremap(range.cpu_addr,
+ range.size);
+ of_pci_range_to_resource(&range, node, &pcie->io);
+ pcie->io.start = range.cpu_addr;
+ pcie->io.end = range.cpu_addr + range.size - 1;
pcie->offset.io = 0x00000000UL;
break;
case IORESOURCE_MEM:
- res = &pcie->mem;
+ of_pci_range_to_resource(&range, node, &pcie->mem);
pcie->offset.mem = 0x00000000UL;
break;
}
-
- if (res)
- of_pci_range_to_resource(&range, node, res);
}
err = of_pci_parse_bus_range(node, &pcie->busn);
@@ -318,6 +319,8 @@ static int mt7621_pci_parse_request_of_p
pcie->busn.flags = IORESOURCE_BUS;
}
+ set_io_port_base(pcie->io_map_base);
+
return 0;
}
@@ -548,6 +551,10 @@ static void mt7621_pcie_enable_ports(str
u32 slot;
u32 val;
+ /* Setup MEMWIN and IOWIN */
+ pcie_write(pcie, 0xffffffff, RALINK_PCI_MEMBASE);
+ pcie_write(pcie, pcie->io.start, RALINK_PCI_IOBASE);
+
list_for_each_entry(port, &pcie->ports, list) {
if (port->enabled) {
mt7621_pcie_port_clk_enable(port);
@@ -668,11 +675,17 @@ static int mt7621_pci_probe(struct platf
return err;
}
+ err = mt7621_pci_parse_request_of_pci_ranges(pcie);
+ if (err) {
+ dev_err(dev, "Error requesting pci resources from ranges");
+ goto out_release_gpios;
+ }
+
/* set resources limits */
- iomem_resource.start = 0;
- iomem_resource.end = ~0UL; /* no limit */
- ioport_resource.start = 0;
- ioport_resource.end = ~0UL; /* no limit */
+ iomem_resource.start = pcie->mem.start;
+ iomem_resource.end = pcie->mem.end;
+ ioport_resource.start = pcie->io.start;
+ ioport_resource.end = pcie->io.end;
mt7621_pcie_init_ports(pcie);
@@ -685,12 +698,6 @@ static int mt7621_pci_probe(struct platf
mt7621_pcie_enable_ports(pcie);
- err = mt7621_pci_parse_request_of_pci_ranges(pcie);
- if (err) {
- dev_err(dev, "Error requesting pci resources from ranges");
- goto out_release_gpios;
- }
-
setup_cm_memory_region(pcie);
err = mt7621_pcie_request_resources(pcie, &res);

28
target/linux/ramips/patches-5.4/0108-staging-mt7621-pci-fix-register-to-set-up-virtual-br.patch Normal file
View File

@ -0,0 +1,28 @@
From 0a3085ae142d8f5cf905b104bc66db3721a2fa33 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Thu, 19 Mar 2020 10:57:33 +0100
Subject: [PATCH] staging: mt7621-pci: fix register to set up virtual bridges
Instead of being using PCI Configuration and Status Register to
set up virtual bridges we are using CONFIG_ADDR Register which is
wrong. Hence, set the correct value.
Fixes: 9a5e71a68d20 ("staging: mt7621-pci: simplify 'mt7621_pcie_init_virtual_bridges' function")
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200319095733.1557-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -603,7 +603,7 @@ static int mt7621_pcie_init_virtual_brid
if ((pcie_link_status & BIT(i)) == 0)
p2p_br_devnum[i] = n++;
- pcie_rmw(pcie, RALINK_PCI_CONFIG_ADDR,
+ pcie_rmw(pcie, RALINK_PCI_PCICFG_ADDR,
PCIE_P2P_BR_DEVNUM_MASK_FULL,
(p2p_br_devnum[0] << PCIE_P2P_BR_DEVNUM0_SHIFT) |
(p2p_br_devnum[1] << PCIE_P2P_BR_DEVNUM1_SHIFT) |

34
target/linux/ramips/patches-5.4/0109-staging-mt7621-pci-don-t-return-if-get-gpio-fails.patch Normal file
View File

@ -0,0 +1,34 @@
From 23a788c23ed10e0d79092fcb693dcf0e357e1f7e Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Thu, 19 Mar 2020 17:14:16 +0100
Subject: [PATCH] staging: mt7621-pci: don't return if get gpio fails
In some platforms gpio's are not used for reset but
for other purposes. Because of that when we try to
get them are valid gpio's but are already assigned
to do other function. To avoid those kind of problems
in those platforms just notice the fail in the kernel
but continue doing normal boot.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200319161416.19033-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -363,10 +363,8 @@ static int mt7621_pcie_parse_port(struct
port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot,
GPIOD_OUT_LOW);
- if (IS_ERR(port->gpio_rst)) {
- dev_err(dev, "Failed to get GPIO for PCIe%d\n", slot);
- return PTR_ERR(port->gpio_rst);
- }
+ if (IS_ERR(port->gpio_rst))
+ dev_notice(dev, "Failed to get GPIO for PCIe%d\n", slot);
port->slot = slot;
port->pcie = pcie;

272
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@ -0,0 +1,272 @@
From 91eb47531421f0e8c9bc4594b4a7caa0e59dc83e Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 20 Mar 2020 12:01:19 +0100
Subject: [PATCH] staging: mt7621-pci-phy: avoid to create to different phys
for a dual port one
This soc has two phy's for the pcie one of them using just a different
register for settig it up but sharing all the rest of the config. Until
now we was presenting this schema as three different phy's in the device
tree using the 'phy-cells' node property to discriminate an index and
setting up a complete phy for the dual port index. This sometimes worked
properly but reconfiguring the same registers twice presents sometimes
some unstable pcie links and the ports was not properly being detected.
The problems only appears on hard resets and soft resets was properly
working. Instead of having this schema just set two phy's in the device
ree and use the 'phy-cells' property to say if the port has or not a dual
port. Doing this configuration and set up becomes easier, LOC is decreased
and the behaviour also gets deterministic with properly and stable pcie
links in both hard and soft resets.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200320110123.9907-2-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c | 144 ++++++++++--------------
1 file changed, 59 insertions(+), 85 deletions(-)
--- a/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c
+++ b/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c
@@ -78,31 +78,21 @@
#define MAX_PHYS 2
/**
- * struct mt7621_pci_phy_instance - Mt7621 Pcie PHY device
- * @phy: pointer to the kernel PHY device
- * @port_base: base register
- * @index: internal ID to identify the Mt7621 PCIe PHY
- */
-struct mt7621_pci_phy_instance {
- struct phy *phy;
- void __iomem *port_base;
- u32 index;
-};
-
-/**
* struct mt7621_pci_phy - Mt7621 Pcie PHY core
* @dev: pointer to device
* @regmap: kernel regmap pointer
- * @phys: pointer to Mt7621 PHY device
- * @nphys: number of PHY devices for this core
+ * @phy: pointer to the kernel PHY device
+ * @port_base: base register
+ * @has_dual_port: if the phy has dual ports.
* @bypass_pipe_rst: mark if 'mt7621_bypass_pipe_rst'
* needs to be executed. Depends on chip revision.
*/
struct mt7621_pci_phy {
struct device *dev;
struct regmap *regmap;
- struct mt7621_pci_phy_instance **phys;
- int nphys;
+ struct phy *phy;
+ void __iomem *port_base;
+ bool has_dual_port;
bool bypass_pipe_rst;
};
@@ -130,23 +120,23 @@ static inline void mt7621_phy_rmw(struct
phy_write(phy, val, reg);
}
-static void mt7621_bypass_pipe_rst(struct mt7621_pci_phy *phy,
- struct mt7621_pci_phy_instance *instance)
+static void mt7621_bypass_pipe_rst(struct mt7621_pci_phy *phy)
{
- u32 offset = (instance->index != 1) ?
- RG_PE1_PIPE_REG : RG_PE1_PIPE_REG + RG_P0_TO_P1_WIDTH;
+ mt7621_phy_rmw(phy, RG_PE1_PIPE_REG, 0, RG_PE1_PIPE_RST);
+ mt7621_phy_rmw(phy, RG_PE1_PIPE_REG, 0, RG_PE1_PIPE_CMD_FRC);
- mt7621_phy_rmw(phy, offset,
- RG_PE1_PIPE_RST | RG_PE1_PIPE_CMD_FRC,
- RG_PE1_PIPE_RST | RG_PE1_PIPE_CMD_FRC);
+ if (phy->has_dual_port) {
+ mt7621_phy_rmw(phy, RG_PE1_PIPE_REG + RG_P0_TO_P1_WIDTH,
+ 0, RG_PE1_PIPE_RST);
+ mt7621_phy_rmw(phy, RG_PE1_PIPE_REG + RG_P0_TO_P1_WIDTH,
+ 0, RG_PE1_PIPE_CMD_FRC);
+ }
}
-static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy,
- struct mt7621_pci_phy_instance *instance)
+static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy)
{
struct device *dev = phy->dev;
u32 reg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0);
- u32 offset;
reg = (reg >> 6) & 0x7;
/* Set PCIe Port PHY to disable SSC */
@@ -156,10 +146,13 @@ static void mt7621_set_phy_for_ssc(struc
RG_PE1_FRC_H_XTAL_TYPE | RG_PE1_H_XTAL_TYPE_VAL(0x00));
/* disable port */
- offset = (instance->index != 1) ?
- RG_PE1_FRC_PHY_REG : RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH;
- mt7621_phy_rmw(phy, offset,
- RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN, RG_PE1_FRC_PHY_EN);
+ mt7621_phy_rmw(phy, RG_PE1_FRC_PHY_REG,
+ RG_PE1_PHY_EN, RG_PE1_FRC_PHY_EN);
+
+ if (phy->has_dual_port) {
+ mt7621_phy_rmw(phy, RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH,
+ RG_PE1_PHY_EN, RG_PE1_FRC_PHY_EN);
+ }
if (reg <= 5 && reg >= 3) { /* 40MHz Xtal */
/* Set Pre-divider ratio (for host mode) */
@@ -223,43 +216,44 @@ static void mt7621_set_phy_for_ssc(struc
static int mt7621_pci_phy_init(struct phy *phy)
{
- struct mt7621_pci_phy_instance *instance = phy_get_drvdata(phy);
- struct mt7621_pci_phy *mphy = dev_get_drvdata(phy->dev.parent);
+ struct mt7621_pci_phy *mphy = phy_get_drvdata(phy);
if (mphy->bypass_pipe_rst)
- mt7621_bypass_pipe_rst(mphy, instance);
+ mt7621_bypass_pipe_rst(mphy);
- mt7621_set_phy_for_ssc(mphy, instance);
+ mt7621_set_phy_for_ssc(mphy);
return 0;
}
static int mt7621_pci_phy_power_on(struct phy *phy)
{
- struct mt7621_pci_phy_instance *instance = phy_get_drvdata(phy);
- struct mt7621_pci_phy *mphy = dev_get_drvdata(phy->dev.parent);
- u32 offset = (instance->index != 1) ?
- RG_PE1_FRC_PHY_REG : RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH;
+ struct mt7621_pci_phy *mphy = phy_get_drvdata(phy);
/* Enable PHY and disable force mode */
- mt7621_phy_rmw(mphy, offset,
- RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN,
- RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN);
+ mt7621_phy_rmw(mphy, RG_PE1_FRC_PHY_REG,
+ RG_PE1_FRC_PHY_EN, RG_PE1_PHY_EN);
+
+ if (mphy->has_dual_port) {
+ mt7621_phy_rmw(mphy, RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH,
+ RG_PE1_FRC_PHY_EN, RG_PE1_PHY_EN);
+ }
return 0;
}
static int mt7621_pci_phy_power_off(struct phy *phy)
{
- struct mt7621_pci_phy_instance *instance = phy_get_drvdata(phy);
- struct mt7621_pci_phy *mphy = dev_get_drvdata(phy->dev.parent);
- u32 offset = (instance->index != 1) ?
- RG_PE1_FRC_PHY_REG : RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH;
+ struct mt7621_pci_phy *mphy = phy_get_drvdata(phy);
/* Disable PHY */
- mt7621_phy_rmw(mphy, offset,
- RG_PE1_FRC_PHY_EN | RG_PE1_PHY_EN,
- RG_PE1_FRC_PHY_EN);
+ mt7621_phy_rmw(mphy, RG_PE1_FRC_PHY_REG,
+ RG_PE1_PHY_EN, RG_PE1_FRC_PHY_EN);
+
+ if (mphy->has_dual_port) {
+ mt7621_phy_rmw(mphy, RG_PE1_FRC_PHY_REG + RG_P0_TO_P1_WIDTH,
+ RG_PE1_PHY_EN, RG_PE1_FRC_PHY_EN);
+ }
return 0;
}
@@ -282,13 +276,15 @@ static struct phy *mt7621_pcie_phy_of_xl
{
struct mt7621_pci_phy *mt7621_phy = dev_get_drvdata(dev);
- if (args->args_count == 0)
- return mt7621_phy->phys[0]->phy;
-
if (WARN_ON(args->args[0] >= MAX_PHYS))
return ERR_PTR(-ENODEV);
- return mt7621_phy->phys[args->args[0]]->phy;
+ mt7621_phy->has_dual_port = args->args[0];
+
+ dev_info(dev, "PHY for 0x%08x (dual port = %d)\n",
+ (unsigned int)mt7621_phy->port_base, mt7621_phy->has_dual_port);
+
+ return mt7621_phy->phy;
}
static const struct soc_device_attribute mt7621_pci_quirks_match[] = {
@@ -309,19 +305,11 @@ static int mt7621_pci_phy_probe(struct p
struct phy_provider *provider;
struct mt7621_pci_phy *phy;
struct resource *res;
- int port;
- void __iomem *port_base;
phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
if (!phy)
return -ENOMEM;
- phy->nphys = MAX_PHYS;
- phy->phys = devm_kcalloc(dev, phy->nphys,
- sizeof(*phy->phys), GFP_KERNEL);
- if (!phy->phys)
- return -ENOMEM;
-
attr = soc_device_match(mt7621_pci_quirks_match);
if (attr)
phy->bypass_pipe_rst = true;
@@ -335,39 +323,25 @@ static int mt7621_pci_phy_probe(struct p
return -ENXIO;
}
- port_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(port_base)) {
+ phy->port_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(phy->port_base)) {
dev_err(dev, "failed to remap phy regs\n");
- return PTR_ERR(port_base);
+ return PTR_ERR(phy->port_base);
}
- phy->regmap = devm_regmap_init_mmio(phy->dev, port_base,
+ phy->regmap = devm_regmap_init_mmio(phy->dev, phy->port_base,
&mt7621_pci_phy_regmap_config);
if (IS_ERR(phy->regmap))
return PTR_ERR(phy->regmap);
- for (port = 0; port < MAX_PHYS; port++) {
- struct mt7621_pci_phy_instance *instance;
- struct phy *pphy;
-
- instance = devm_kzalloc(dev, sizeof(*instance), GFP_KERNEL);
- if (!instance)
- return -ENOMEM;
-
- phy->phys[port] = instance;
-
- pphy = devm_phy_create(dev, dev->of_node, &mt7621_pci_phy_ops);
- if (IS_ERR(phy)) {
- dev_err(dev, "failed to create phy\n");
- return PTR_ERR(phy);
- }
-
- instance->port_base = port_base;
- instance->phy = pphy;
- instance->index = port;
- phy_set_drvdata(pphy, instance);
+ phy->phy = devm_phy_create(dev, dev->of_node, &mt7621_pci_phy_ops);
+ if (IS_ERR(phy)) {
+ dev_err(dev, "failed to create phy\n");
+ return PTR_ERR(phy);
}
+ phy_set_drvdata(phy->phy, phy);
+
provider = devm_of_phy_provider_register(dev, mt7621_pcie_phy_of_xlate);
return PTR_ERR_OR_ZERO(provider);

42
target/linux/ramips/patches-5.4/0111-staging-mt7621-pci-use-only-two-phys-from-device-tre.patch Normal file
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@ -0,0 +1,42 @@
From c752b54bda4d772426c5eeb56978d2e41bd525b4 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 20 Mar 2020 12:01:21 +0100
Subject: [PATCH] staging: mt7621-pci: use only two phys from device tree
In order to align work with the mt7621-pci-phy part of
the driver and device tree which is now using only two
real phys one of them dual ported properly parse the
device tree and don't call phy initialization for the
slot 1 because is being taking into account when the
phy for the slot 0 is instantiated.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200320110123.9907-4-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -358,7 +358,7 @@ static int mt7621_pcie_parse_port(struct
snprintf(name, sizeof(name), "pcie-phy%d", slot);
port->phy = devm_phy_get(dev, name);
- if (IS_ERR(port->phy))
+ if (IS_ERR(port->phy) && slot != 1)
return PTR_ERR(port->phy);
port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot,
@@ -495,6 +495,11 @@ static void mt7621_pcie_init_ports(struc
list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
u32 slot = port->slot;
+ if (slot == 1) {
+ port->enabled = true;
+ continue;
+ }
+
err = mt7621_pcie_init_port(port);
if (err) {
dev_err(dev, "Initiating port %d failed\n", slot);

26
target/linux/ramips/patches-5.4/0112-staging-mt7621-pci-change-variable-to-print-for-slot.patch Normal file
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@ -0,0 +1,26 @@
From b59343b7de448c30e5b098484a7c7c5cb300df2f Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 20 Mar 2020 12:01:22 +0100
Subject: [PATCH] staging: mt7621-pci: change variable to print for slot
We are using the counter to print the slot which has been
enabled. Use the correct associated slot for the port instead.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200320110123.9907-5-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -562,7 +562,7 @@ static void mt7621_pcie_enable_ports(str
if (port->enabled) {
mt7621_pcie_port_clk_enable(port);
mt7621_pcie_enable_port(port);
- dev_info(dev, "PCIE%d enabled\n", num_slots_enabled);
+ dev_info(dev, "PCIE%d enabled\n", port->slot);
num_slots_enabled++;
}
}

33
target/linux/ramips/patches-5.4/0113-staging-mt7621-pci-be-sure-gpio-descriptor-is-null-o.patch Normal file
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@ -0,0 +1,33 @@
From 87068309300c707d659ce79232eae827604804a4 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 20 Mar 2020 12:01:23 +0100
Subject: [PATCH] staging: mt7621-pci: be sure gpio descriptor is null on fails
Function 'devm_gpiod_get_index_optional' returns NULL if the
descriptor is invalid and the error associated for the error
pointer is ENOENT. Sometimes if the pin is just assigned the
error associated for the pointer might not be ENOENT but other.
In order to avoid weirds behaviours if this happen set descriptor
to NULL in the driver port structure.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200320110123.9907-6-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -363,8 +363,10 @@ static int mt7621_pcie_parse_port(struct
port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot,
GPIOD_OUT_LOW);
- if (IS_ERR(port->gpio_rst))
+ if (IS_ERR(port->gpio_rst)) {
dev_notice(dev, "Failed to get GPIO for PCIe%d\n", slot);
+ port->gpio_rst = NULL;
+ }
port->slot = slot;
port->pcie = pcie;

79
target/linux/ramips/patches-5.4/0114-staging-mt7621-pci-avoid-to-poweroff-the-phy-for-slo.patch Normal file
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@ -0,0 +1,79 @@
From d81fe3c13aa6f4ab1ec318212d2007175e6d05aa Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 20 Mar 2020 16:38:37 +0100
Subject: [PATCH] staging: mt7621-pci: avoid to poweroff the phy for slot one
Phy for slot 0 and 1 is shared and handled properly in slot 0.
If there is only one port in use,(slot 0) we shall not call the
'phy_power_off' function with an invalid slot because kernel
will crash with an unaligned access fault like the following:
mt7621-pci 1e140000.pcie: Error applying setting, reverse things back
mt7621-pci-phy 1e149000.pcie-phy: PHY for 0xbe149000 (dual port = 1)
mt7621-pci-phy 1e14a000.pcie-phy: PHY for 0xbe14a000 (dual port = 0)
mt7621-pci-phy 1e149000.pcie-phy: Xtal is 40MHz
mt7621-pci-phy 1e14a000.pcie-phy: Xtal is 40MHz
mt7621-pci 1e140000.pcie: pcie1 no card, disable it (RST & CLK)
Unhandled kernel unaligned access[#1]:
CPU: 3 PID: 111 Comm: kworker/3:2 Not tainted 5.6.0-rc3-00347-g825c6f470c62-dirty #9
Workqueue: events deferred_probe_work_func
$ 0 : 00000000 00000001 5f60d043 8fe1ba80
$ 4 : 0000010d 01eb9000 00000000 00000000
$ 8 : 294b4c00 80940000 00000008 000000ce
$12 : 2e303030 00000000 00000000 65696370
$16 : ffffffed 0000010d 8e373cd0 8214c1e0
$20 : 00000000 82144c80 82144680 8214c250
$24 : 00000018 803ef8f4
$28 : 8e372000 8e373c60 8214c080 803940e8
Hi : 00000125
Lo : 122f2000
epc : 807b3328 mutex_lock+0x8/0x44
ra : 803940e8 phy_power_off+0x28/0xb0
Status: 1100fc03 KERNEL EXL IE
Cause : 00800010 (ExcCode 04)
BadVA : 0000010d
PrId : 0001992f (MIPS 1004Kc)
Modules linked in:
Process kworker/3:2 (pid: 111, threadinfo=(ptrval), task=(ptrval), tls=00000000)
Stack : 8e373cd0 803fe4f4 8e372000 8e373c90 8214c080 804fde1c 8e373c98 808d62f4
8e373c78 00000000 8214c254 804fe648 1e160000 804f27b8 00000001 808d62f4
00000000 00000001 8214c228 808d62f4 80930000 809a0000 8fd47e10 808d63d4
808d62d4 8fd47e10 808d0000 808d0000 8e373cd0 8e373cd0 809e2a74 809db510
809db510 00000006 00000001 00000000 00000000 00000000 01000000 1e1440ff
...
Call Trace:
[<807b3328>] mutex_lock+0x8/0x44
[<803940e8>] phy_power_off+0x28/0xb0
[<804fe648>] mt7621_pci_probe+0xc20/0xd18
[<80402ab8>] platform_drv_probe+0x40/0x94
[<80400a74>] really_probe+0x104/0x364
[<803feb74>] bus_for_each_drv+0x84/0xdc
[<80400924>] __device_attach+0xdc/0x120
[<803ffb5c>] bus_probe_device+0xa0/0xbc
[<80400124>] deferred_probe_work_func+0x7c/0xbc
[<800420e8>] process_one_work+0x230/0x450
[<80042638>] worker_thread+0x330/0x5fc
[<80048eb0>] kthread+0x12c/0x134
[<80007438>] ret_from_kernel_thread+0x14/0x1c
Code: 24050002 27bdfff8 8f830000 <c0850000> 14a00005 00000000 00600825 e0810000 1020fffa
Fixes: bf516f413f4e ("staging: mt7621-pci: use only two phys from device tree")
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200320153837.20415-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -517,7 +517,8 @@ static void mt7621_pcie_init_ports(struc
if (!mt7621_pcie_port_is_linkup(port)) {
dev_err(dev, "pcie%d no card, disable it (RST & CLK)\n",
slot);
- phy_power_off(port->phy);
+ if (slot != 1)
+ phy_power_off(port->phy);
mt7621_control_assert(port);
mt7621_pcie_port_clk_disable(port);
port->enabled = false;

91
target/linux/ramips/patches-5.4/0115-staging-mt7621-pci-delete-release-gpios-related-code.patch Normal file
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@ -0,0 +1,91 @@
From 9d789a7728c37e8730b6a9cca60cf155f18537ea Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Sat, 21 Mar 2020 08:26:50 +0100
Subject: [PATCH] staging: mt7621-pci: delete release gpios related code
Making gpio8 and gpio9 vendor specific and putting them
into the specific dts file makes not needed to release
gpios anymore because we are not occupying those pins
in the first place if it is not necessary. When the
device tree is parsed we can also check and return for
the error because we rely in the fact that the related
device for the board is correct.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200321072650.7784-3-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 27 +++++++--------------------
1 file changed, 7 insertions(+), 20 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -364,8 +364,8 @@ static int mt7621_pcie_parse_port(struct
port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot,
GPIOD_OUT_LOW);
if (IS_ERR(port->gpio_rst)) {
- dev_notice(dev, "Failed to get GPIO for PCIe%d\n", slot);
- port->gpio_rst = NULL;
+ dev_err(dev, "Failed to get GPIO for PCIe%d\n", slot);
+ return PTR_ERR(port->gpio_rst);
}
port->slot = slot;
@@ -474,15 +474,6 @@ static void mt7621_pcie_reset_ep_deasser
mdelay(PERST_DELAY_MS);
}
-static void mt7621_pcie_release_gpios(struct mt7621_pcie *pcie)
-{
- struct mt7621_pcie_port *port;
-
- list_for_each_entry(port, &pcie->ports, list)
- if (port->gpio_rst)
- gpiod_put(port->gpio_rst);
-}
-
static void mt7621_pcie_init_ports(struct mt7621_pcie *pcie)
{
struct device *dev = pcie->dev;
@@ -684,7 +675,7 @@ static int mt7621_pci_probe(struct platf
err = mt7621_pci_parse_request_of_pci_ranges(pcie);
if (err) {
dev_err(dev, "Error requesting pci resources from ranges");
- goto out_release_gpios;
+ return err;
}
/* set resources limits */
@@ -698,8 +689,7 @@ static int mt7621_pci_probe(struct platf
err = mt7621_pcie_init_virtual_bridges(pcie);
if (err) {
dev_err(dev, "Nothing is connected in virtual bridges. Exiting...");
- err = 0;
- goto out_release_gpios;
+ return 0;
}
mt7621_pcie_enable_ports(pcie);
@@ -709,19 +699,16 @@ static int mt7621_pci_probe(struct platf
err = mt7621_pcie_request_resources(pcie, &res);
if (err) {
dev_err(dev, "Error requesting resources\n");
- goto out_release_gpios;
+ return err;
}
err = mt7621_pcie_register_host(bridge, &res);
if (err) {
dev_err(dev, "Error registering host\n");
- goto out_release_gpios;
+ return err;
}
-out_release_gpios:
- mt7621_pcie_release_gpios(pcie);
-
- return err;
+ return 0;
}
static const struct of_device_id mt7621_pci_ids[] = {

29
target/linux/ramips/patches-5.4/0116-staging-mt7621-pci-use-builtin_platform_driver.patch Normal file
View File

@ -0,0 +1,29 @@
From 60a15339ceab9fc2a6cdc85fd54b66b2c947ab4e Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Sat, 21 Mar 2020 14:36:21 +0100
Subject: [PATCH] staging: mt7621-pci: use builtin_platform_driver()
Macro builtin_platform_driver can be used for builtin drivers
that don't do anything in driver init. So, use the macro
builtin_platform_driver and remove some boilerplate code.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200321133624.31388-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -725,9 +725,4 @@ static struct platform_driver mt7621_pci
},
};
-static int __init mt7621_pci_init(void)
-{
- return platform_driver_register(&mt7621_pci_driver);
-}
-
-module_init(mt7621_pci_init);
+builtin_platform_driver(mt7621_pci_driver);

32
target/linux/ramips/patches-5.4/0117-staging-mt7621-pci-phy-use-builtin_platform_driver.patch Normal file
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@ -0,0 +1,32 @@
From ffe3dee4081055b4f58bc50dd3f5c97de42cf126 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Sat, 21 Mar 2020 14:36:23 +0100
Subject: [PATCH] staging: mt7621-pci-phy: use builtin_platform_driver()
Macro builtin_platform_driver can be used for builtin drivers
that don't do anything in driver init. So, use the macro
builtin_platform_driver and remove some boilerplate code.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200321133624.31388-3-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
--- a/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c
+++ b/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c
@@ -361,12 +361,7 @@ static struct platform_driver mt7621_pci
},
};
-static int __init mt7621_pci_phy_drv_init(void)
-{
- return platform_driver_register(&mt7621_pci_phy_driver);
-}
-
-module_init(mt7621_pci_phy_drv_init);
+builtin_platform_driver(mt7621_pci_phy_driver);
MODULE_AUTHOR("Sergio Paracuellos <sergio.paracuellos@gmail.com>");
MODULE_DESCRIPTION("MediaTek MT7621 PCIe PHY driver");

68
target/linux/ramips/patches-5.4/0118-staging-mt7621-pci-phy-re-do-xtal_mode-detection.patch Normal file
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@ -0,0 +1,68 @@
From ff83e3023cb8fc3b5dfc12e0c91bf1eb9dc4c4c6 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Sat, 21 Mar 2020 14:36:24 +0100
Subject: [PATCH] staging: mt7621-pci-phy: re-do 'xtal_mode' detection
Detection of the Xtal mode is using magic numbers that
can be avoided using properly some definitions and a more
accurate variable name from 'reg' into 'xtal_mode'. This
increase readability.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200321133624.31388-4-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
--- a/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c
+++ b/drivers/staging/mt7621-pci-phy/pci-mt7621-phy.c
@@ -75,6 +75,9 @@
#define RG_PE1_FRC_MSTCKDIV BIT(5)
+#define XTAL_MODE_SEL_SHIFT 6
+#define XTAL_MODE_SEL_MASK 0x7
+
#define MAX_PHYS 2
/**
@@ -136,9 +139,11 @@ static void mt7621_bypass_pipe_rst(struc
static void mt7621_set_phy_for_ssc(struct mt7621_pci_phy *phy)
{
struct device *dev = phy->dev;
- u32 reg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0);
+ u32 xtal_mode;
+
+ xtal_mode = (rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0)
+ >> XTAL_MODE_SEL_SHIFT) & XTAL_MODE_SEL_MASK;
- reg = (reg >> 6) & 0x7;
/* Set PCIe Port PHY to disable SSC */
/* Debug Xtal Type */
mt7621_phy_rmw(phy, RG_PE1_FRC_H_XTAL_REG,
@@ -154,13 +159,13 @@ static void mt7621_set_phy_for_ssc(struc
RG_PE1_PHY_EN, RG_PE1_FRC_PHY_EN);
}
- if (reg <= 5 && reg >= 3) { /* 40MHz Xtal */
+ if (xtal_mode <= 5 && xtal_mode >= 3) { /* 40MHz Xtal */
/* Set Pre-divider ratio (for host mode) */
mt7621_phy_rmw(phy, RG_PE1_H_PLL_REG,
RG_PE1_H_PLL_PREDIV,
RG_PE1_H_PLL_PREDIV_VAL(0x01));
dev_info(dev, "Xtal is 40MHz\n");
- } else if (reg >= 6) { /* 25MHz Xal */
+ } else if (xtal_mode >= 6) { /* 25MHz Xal */
mt7621_phy_rmw(phy, RG_PE1_H_PLL_REG,
RG_PE1_H_PLL_PREDIV,
RG_PE1_H_PLL_PREDIV_VAL(0x00));
@@ -206,7 +211,7 @@ static void mt7621_set_phy_for_ssc(struc
mt7621_phy_rmw(phy, RG_PE1_H_PLL_BR_REG,
RG_PE1_H_PLL_BR, RG_PE1_H_PLL_BR_VAL(0x00));
- if (reg <= 5 && reg >= 3) { /* 40MHz Xtal */
+ if (xtal_mode <= 5 && xtal_mode >= 3) { /* 40MHz Xtal */
/* set force mode enable of da_pe1_mstckdiv */
mt7621_phy_rmw(phy, RG_PE1_MSTCKDIV_REG,
RG_PE1_MSTCKDIV | RG_PE1_FRC_MSTCKDIV,

35
target/linux/ramips/patches-5.4/0119-staging-mt7621-pci-avoid-to-set-iomem_resource-addre.patch Normal file
View File

@ -0,0 +1,35 @@
From 4f0f36b67564311a4ce4441510ef94848febbab2 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Sun, 22 Mar 2020 08:21:28 +0100
Subject: [PATCH] staging: mt7621-pci: avoid to set 'iomem_resource' addresses
Setting up kernel resource 'iomem_resource' for PCI with
addresses parsed from device tree gots into a conflict within
the usb xhci driver:
xhci-mtk 1e1c0000.xhci: can't request region for resource [mem 0x1e1c0000-0x1e1c0fff]
xhci-mtk: probe of 1e1c0000.xhci failed with error -16
Don't assign it and maintain the default addresses for this
resource seems to fix the problem. Checking legacy driver it
is being only setting the 'ioport_resource'.
Fixes: 09dd629eeabb ("staging: mt7621-pci: fix io space and properly set resource limits")
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200322072128.4454-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/mt7621-pci/pci-mt7621.c | 2 --
1 file changed, 2 deletions(-)
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/staging/mt7621-pci/pci-mt7621.c
@@ -679,8 +679,6 @@ static int mt7621_pci_probe(struct platf
}
/* set resources limits */
- iomem_resource.start = pcie->mem.start;
- iomem_resource.end = pcie->mem.end;
ioport_resource.start = pcie->io.start;
ioport_resource.end = pcie->io.end;