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ramips: split mt7621 spi into a separate driver, increase maximum transfer size

Browse source 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 43807
This commit is contained in:
Felix Fietkau 2015-01-02 21:52:53 +00:00
parent cc5f89c66a
commit aefd3c569c
9 changed files with 455 additions and 452 deletions
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1
target/linux/ramips/mt7620/config-3.14
View file

@ -164,6 +164,7 @@ CONFIG_SOC_MT7620=y
# CONFIG_SOC_RT3883 is not set
CONFIG_SPI=y
CONFIG_SPI_MASTER=y
# CONFIG_SPI_MT7621 is not set
CONFIG_SPI_RT2880=y
CONFIG_SWCONFIG=y
CONFIG_SYS_HAS_CPU_MIPS32_R1=y

3
target/linux/ramips/mt7621/config-3.14
View file

@ -177,7 +177,8 @@ CONFIG_SOC_MT7621=y
# CONFIG_SOC_RT3883 is not set
CONFIG_SPI=y
CONFIG_SPI_MASTER=y
CONFIG_SPI_RT2880=y
CONFIG_SPI_MT7621=y
# CONFIG_SPI_RT2880 is not set
CONFIG_STOP_MACHINE=y
CONFIG_SWCONFIG=y
CONFIG_SYNC_R4K=y

3
target/linux/ramips/mt7628/config-3.14
View file

@ -164,7 +164,8 @@ CONFIG_SOC_MT7620=y
# CONFIG_SOC_RT3883 is not set
CONFIG_SPI=y
CONFIG_SPI_MASTER=y
CONFIG_SPI_RT2880=y
CONFIG_SPI_MT7621=y
# CONFIG_SPI_RT2880 is not set
CONFIG_SWCONFIG=y
CONFIG_SYS_HAS_CPU_MIPS32_R1=y
CONFIG_SYS_HAS_CPU_MIPS32_R2=y

346
target/linux/ramips/patches-3.14/0051-SPI-MIPS-ralink-add-mt7621-support.patch
View file

@ -1,346 +0,0 @@
From 27b11d4f1888e1a3d6d75b46d4d5a4d86fc03891 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Wed, 6 Aug 2014 10:53:40 +0200
Subject: [PATCH 51/57] SPI: MIPS: ralink: add mt7621 support
Signed-off-by: John Crispin <blogic@openwrt.org>
---
drivers/spi/spi-rt2880.c | 218 +++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 205 insertions(+), 13 deletions(-)
--- a/drivers/spi/spi-rt2880.c
+++ b/drivers/spi/spi-rt2880.c
@@ -21,8 +21,13 @@
#include <linux/io.h>
#include <linux/reset.h>
#include <linux/spi/spi.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <ralink_regs.h>
+
+#define SPI_BPW_MASK(bits) BIT((bits) - 1)
+
#define DRIVER_NAME "spi-rt2880"
/* only one slave is supported*/
#define RALINK_NUM_CHIPSELECTS 1
@@ -63,6 +68,25 @@
/* SPIFIFOSTAT register bit field */
#define SPIFIFOSTAT_TXFULL BIT(17)
+#define MT7621_SPI_TRANS 0x00
+#define SPITRANS_BUSY BIT(16)
+#define MT7621_SPI_OPCODE 0x04
+#define MT7621_SPI_DATA0 0x08
+#define SPI_CTL_TX_RX_CNT_MASK 0xff
+#define SPI_CTL_START BIT(8)
+#define MT7621_SPI_POLAR 0x38
+#define MT7621_SPI_MASTER 0x28
+#define MT7621_SPI_SPACE 0x3c
+
+struct rt2880_spi;
+
+struct rt2880_spi_ops {
+ void (*init_hw)(struct rt2880_spi *rs);
+ void (*set_cs)(struct rt2880_spi *rs, int enable);
+ int (*baudrate_set)(struct spi_device *spi, unsigned int speed);
+ unsigned int (*write_read)(struct spi_device *spi, struct list_head *list, struct spi_transfer *xfer);
+};
+
struct rt2880_spi {
struct spi_master *master;
void __iomem *base;
@@ -70,6 +94,8 @@ struct rt2880_spi {
unsigned int speed;
struct clk *clk;
spinlock_t lock;
+
+ struct rt2880_spi_ops *ops;
};
static inline struct rt2880_spi *spidev_to_rt2880_spi(struct spi_device *spi)
@@ -149,6 +175,17 @@ static int rt2880_spi_baudrate_set(struc
return 0;
}
+static int mt7621_spi_baudrate_set(struct spi_device *spi, unsigned int speed)
+{
+/* u32 master = rt2880_spi_read(rs, MT7621_SPI_MASTER);
+
+ // set default clock to hclk/5
+ master &= ~(0xfff << 16);
+ master |= 0x3 << 16;
+*/
+ return 0;
+}
+
/*
* called only when no transfer is active on the bus
*/
@@ -164,7 +201,7 @@ rt2880_spi_setup_transfer(struct spi_dev
if (rs->speed != speed) {
dev_dbg(&spi->dev, "speed_hz:%u\n", speed);
- rc = rt2880_spi_baudrate_set(spi, speed);
+ rc = rs->ops->baudrate_set(spi, speed);
if (rc)
return rc;
}
@@ -180,6 +217,17 @@ static void rt2880_spi_set_cs(struct rt2
rt2880_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_SPIENA);
}
+static void mt7621_spi_set_cs(struct rt2880_spi *rs, int enable)
+{
+ u32 polar = rt2880_spi_read(rs, MT7621_SPI_POLAR);
+
+ if (enable)
+ polar |= 1;
+ else
+ polar &= ~1;
+ rt2880_spi_write(rs, MT7621_SPI_POLAR, polar);
+}
+
static inline int rt2880_spi_wait_till_ready(struct rt2880_spi *rs)
{
int i;
@@ -198,8 +246,26 @@ static inline int rt2880_spi_wait_till_r
return -ETIMEDOUT;
}
+static inline int mt7621_spi_wait_till_ready(struct rt2880_spi *rs)
+{
+ int i;
+
+ for (i = 0; i < RALINK_SPI_WAIT_MAX_LOOP; i++) {
+ u32 status;
+
+ status = rt2880_spi_read(rs, MT7621_SPI_TRANS);
+ if ((status & SPITRANS_BUSY) == 0) {
+ return 0;
+ }
+ cpu_relax();
+ udelay(1);
+ }
+
+ return -ETIMEDOUT;
+}
+
static unsigned int
-rt2880_spi_write_read(struct spi_device *spi, struct spi_transfer *xfer)
+rt2880_spi_write_read(struct spi_device *spi, struct list_head *list, struct spi_transfer *xfer)
{
struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
unsigned count = 0;
@@ -239,6 +305,100 @@ out:
return count;
}
+static unsigned int
+mt7621_spi_write_read(struct spi_device *spi, struct list_head *list, struct spi_transfer *xfer)
+{
+ struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
+ struct spi_transfer *next = NULL;
+ const u8 *tx = xfer->tx_buf;
+ u8 *rx = NULL;
+ u32 trans;
+ int len = xfer->len;
+
+ if (!tx)
+ return 0;
+
+ if (!list_is_last(&xfer->transfer_list, list)) {
+ next = list_entry(xfer->transfer_list.next, struct spi_transfer, transfer_list);
+ rx = next->rx_buf;
+ }
+
+ trans = rt2880_spi_read(rs, MT7621_SPI_TRANS);
+ trans &= ~SPI_CTL_TX_RX_CNT_MASK;
+
+ if (tx) {
+ u32 data0 = 0, opcode = 0;
+
+ switch (xfer->len) {
+ case 8:
+ data0 |= tx[7] << 24;
+ case 7:
+ data0 |= tx[6] << 16;
+ case 6:
+ data0 |= tx[5] << 8;
+ case 5:
+ data0 |= tx[4];
+ case 4:
+ opcode |= tx[3] << 8;
+ case 3:
+ opcode |= tx[2] << 16;
+ case 2:
+ opcode |= tx[1] << 24;
+ case 1:
+ opcode |= tx[0];
+ break;
+
+ default:
+ dev_err(&spi->dev, "trying to write too many bytes: %d\n", next->len);
+ return -EINVAL;
+ }
+
+ rt2880_spi_write(rs, MT7621_SPI_DATA0, data0);
+ rt2880_spi_write(rs, MT7621_SPI_OPCODE, opcode);
+ trans |= xfer->len;
+ }
+
+ if (rx)
+ trans |= (next->len << 4);
+ rt2880_spi_write(rs, MT7621_SPI_TRANS, trans);
+ trans |= SPI_CTL_START;
+ rt2880_spi_write(rs, MT7621_SPI_TRANS, trans);
+
+ mt7621_spi_wait_till_ready(rs);
+
+ if (rx) {
+ u32 data0 = rt2880_spi_read(rs, MT7621_SPI_DATA0);
+ u32 opcode = rt2880_spi_read(rs, MT7621_SPI_OPCODE);
+
+ switch (next->len) {
+ case 8:
+ rx[7] = (opcode >> 24) & 0xff;
+ case 7:
+ rx[6] = (opcode >> 16) & 0xff;
+ case 6:
+ rx[5] = (opcode >> 8) & 0xff;
+ case 5:
+ rx[4] = opcode & 0xff;
+ case 4:
+ rx[3] = (data0 >> 24) & 0xff;
+ case 3:
+ rx[2] = (data0 >> 16) & 0xff;
+ case 2:
+ rx[1] = (data0 >> 8) & 0xff;
+ case 1:
+ rx[0] = data0 & 0xff;
+ break;
+
+ default:
+ dev_err(&spi->dev, "trying to read too many bytes: %d\n", next->len);
+ return -EINVAL;
+ }
+ len += next->len;
+ }
+
+ return len;
+}
+
static int rt2880_spi_transfer_one_message(struct spi_master *master,
struct spi_message *m)
{
@@ -280,25 +440,25 @@ static int rt2880_spi_transfer_one_messa
}
if (!cs_active) {
- rt2880_spi_set_cs(rs, 1);
+ rs->ops->set_cs(rs, 1);
cs_active = 1;
}
if (t->len)
- m->actual_length += rt2880_spi_write_read(spi, t);
+ m->actual_length += rs->ops->write_read(spi, &m->transfers, t);
if (t->delay_usecs)
udelay(t->delay_usecs);
if (t->cs_change) {
- rt2880_spi_set_cs(rs, 0);
+ rs->ops->set_cs(rs, 0);
cs_active = 0;
}
}
msg_done:
if (cs_active)
- rt2880_spi_set_cs(rs, 0);
+ rs->ops->set_cs(rs, 0);
m->status = status;
spi_finalize_current_message(master);
@@ -334,8 +494,41 @@ static void rt2880_spi_reset(struct rt28
rt2880_spi_write(rs, RAMIPS_SPI_CTL, SPICTL_HIZSDO | SPICTL_SPIENA);
}
+static void mt7621_spi_reset(struct rt2880_spi *rs)
+{
+ u32 master = rt2880_spi_read(rs, MT7621_SPI_MASTER);
+
+ master &= ~(0xfff << 16);
+ master |= 3 << 16;
+
+ master |= 7 << 29;
+ rt2880_spi_write(rs, MT7621_SPI_MASTER, master);
+}
+
+static struct rt2880_spi_ops spi_ops[] = {
+ {
+ .init_hw = rt2880_spi_reset,
+ .set_cs = rt2880_spi_set_cs,
+ .baudrate_set = rt2880_spi_baudrate_set,
+ .write_read = rt2880_spi_write_read,
+ }, {
+ .init_hw = mt7621_spi_reset,
+ .set_cs = mt7621_spi_set_cs,
+ .baudrate_set = mt7621_spi_baudrate_set,
+ .write_read = mt7621_spi_write_read,
+ },
+};
+
+static const struct of_device_id rt2880_spi_match[] = {
+ { .compatible = "ralink,rt2880-spi", .data = &spi_ops[0]},
+ { .compatible = "ralink,mt7621-spi", .data = &spi_ops[1] },
+ {},
+};
+MODULE_DEVICE_TABLE(of, rt2880_spi_match);
+
static int rt2880_spi_probe(struct platform_device *pdev)
{
+ const struct of_device_id *match;
struct spi_master *master;
struct rt2880_spi *rs;
unsigned long flags;
@@ -344,6 +537,10 @@ static int rt2880_spi_probe(struct platf
int status = 0;
struct clk *clk;
+ match = of_match_device(rt2880_spi_match, &pdev->dev);
+ if (!match)
+ return -EINVAL;
+
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, r);
if (IS_ERR(base))
@@ -382,12 +579,13 @@ static int rt2880_spi_probe(struct platf
rs->clk = clk;
rs->master = master;
rs->sys_freq = clk_get_rate(rs->clk);
+ rs->ops = (struct rt2880_spi_ops *) match->data;
dev_dbg(&pdev->dev, "sys_freq: %u\n", rs->sys_freq);
spin_lock_irqsave(&rs->lock, flags);
device_reset(&pdev->dev);
- rt2880_spi_reset(rs);
+ rs->ops->init_hw(rs);
return spi_register_master(master);
}
@@ -408,12 +606,6 @@ static int rt2880_spi_remove(struct plat
MODULE_ALIAS("platform:" DRIVER_NAME);
-static const struct of_device_id rt2880_spi_match[] = {
- { .compatible = "ralink,rt2880-spi" },
- {},
-};
-MODULE_DEVICE_TABLE(of, rt2880_spi_match);
-
static struct platform_driver rt2880_spi_driver = {
.driver = {
.name = DRIVER_NAME,

208
target/linux/ramips/patches-3.14/0104-rt5350-spi-second-device.patch → target/linux/ramips/patches-3.14/0051-rt5350-spi-second-device.patch
View file

@ -1,8 +1,27 @@
From 27b11d4f1888e1a3d6d75b46d4d5a4d86fc03891 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Wed, 6 Aug 2014 10:53:40 +0200
Subject: [PATCH 51/57] SPI: MIPS: ralink: add rt5350 dual SPI support
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
drivers/spi/spi-rt2880.c | 218 +++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 205 insertions(+), 13 deletions(-)
--- a/drivers/spi/spi-rt2880.c
+++ b/drivers/spi/spi-rt2880.c
@@ -29,16 +29,17 @@
#define SPI_BPW_MASK(bits) BIT((bits) - 1)
@@ -21,19 +21,25 @@
#include <linux/io.h>
#include <linux/reset.h>
#include <linux/spi/spi.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <ralink_regs.h>
+
+#define SPI_BPW_MASK(bits) BIT((bits) - 1)
+
#define DRIVER_NAME "spi-rt2880"
-/* only one slave is supported*/
-#define RALINK_NUM_CHIPSELECTS 1
@ -25,7 +44,7 @@
/* SPISTAT register bit field */
#define SPISTAT_BUSY BIT(0)
@@ -68,6 +69,10 @@
@@ -63,6 +69,19 @@
/* SPIFIFOSTAT register bit field */
#define SPIFIFOSTAT_TXFULL BIT(17)
@ -33,28 +52,28 @@
+#define SPI1_POR BIT(1)
+#define SPI0_POR BIT(0)
+
#define MT7621_SPI_TRANS 0x00
#define SPITRANS_BUSY BIT(16)
#define MT7621_SPI_OPCODE 0x04
@@ -78,13 +83,16 @@
#define MT7621_SPI_MASTER 0x28
#define MT7621_SPI_SPACE 0x3c
+#define RT2880_SPI_MODE_BITS (SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | SPI_CS_HIGH)
+
struct rt2880_spi;
struct rt2880_spi_ops {
void (*init_hw)(struct rt2880_spi *rs);
- void (*set_cs)(struct rt2880_spi *rs, int enable);
+ void (*set_cs)(struct spi_device *spi, int enable);
int (*baudrate_set)(struct spi_device *spi, unsigned int speed);
unsigned int (*write_read)(struct spi_device *spi, struct list_head *list, struct spi_transfer *xfer);
+struct rt2880_spi;
+
+struct rt2880_spi_ops {
+ void (*init_hw)(struct rt2880_spi *rs);
+ int num_cs;
+};
+
struct rt2880_spi {
struct spi_master *master;
void __iomem *base;
@@ -70,6 +89,8 @@ struct rt2880_spi {
unsigned int speed;
struct clk *clk;
spinlock_t lock;
+
+ struct rt2880_spi_ops *ops;
};
struct rt2880_spi {
@@ -141,6 +149,7 @@ static inline void rt2880_spi_clrbits(st
static inline struct rt2880_spi *spidev_to_rt2880_spi(struct spi_device *spi)
@@ -115,6 +136,7 @@ static inline void rt2880_spi_clrbits(st
static int rt2880_spi_baudrate_set(struct spi_device *spi, unsigned int speed)
{
@ -62,7 +81,7 @@
struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
u32 rate;
u32 prescale;
@@ -168,9 +177,9 @@ static int rt2880_spi_baudrate_set(struc
@@ -142,9 +164,9 @@ static int rt2880_spi_baudrate_set(struc
prescale = ilog2(rate / 2);
dev_dbg(&spi->dev, "prescale:%u\n", prescale);
@ -74,7 +93,7 @@
rs->speed = speed;
return 0;
}
@@ -194,7 +203,8 @@ rt2880_spi_setup_transfer(struct spi_dev
@@ -157,7 +179,8 @@ rt2880_spi_setup_transfer(struct spi_dev
{
struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
unsigned int speed = spi->max_speed_hz;
@ -84,7 +103,7 @@
if ((t != NULL) && t->speed_hz)
speed = t->speed_hz;
@@ -206,19 +216,61 @@ rt2880_spi_setup_transfer(struct spi_dev
@@ -169,25 +192,68 @@ rt2880_spi_setup_transfer(struct spi_dev
return rc;
}
@ -143,17 +162,6 @@
+ rt2880_spi_setbits(rs, RAMIPS_SPI_CTL(cs), SPICTL_SPIENA);
}
-static void mt7621_spi_set_cs(struct rt2880_spi *rs, int enable)
+static void mt7621_spi_set_cs(struct spi_device *spi, int enable)
{
+ struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
u32 polar = rt2880_spi_read(rs, MT7621_SPI_POLAR);
if (enable)
@@ -228,14 +280,16 @@ static void mt7621_spi_set_cs(struct rt2
rt2880_spi_write(rs, MT7621_SPI_POLAR, polar);
}
-static inline int rt2880_spi_wait_till_ready(struct rt2880_spi *rs)
+static inline int rt2880_spi_wait_till_ready(struct spi_device *spi)
{
@ -169,26 +177,19 @@
if ((status & SPISTAT_BUSY) == 0)
return 0;
@@ -246,8 +300,9 @@ static inline int rt2880_spi_wait_till_r
return -ETIMEDOUT;
@@ -199,9 +265,10 @@ static inline int rt2880_spi_wait_till_r
}
-static inline int mt7621_spi_wait_till_ready(struct rt2880_spi *rs)
+static inline int mt7621_spi_wait_till_ready(struct spi_device *spi)
{
+ struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
int i;
for (i = 0; i < RALINK_SPI_WAIT_MAX_LOOP; i++) {
@@ -268,6 +323,7 @@ static unsigned int
rt2880_spi_write_read(struct spi_device *spi, struct list_head *list, struct spi_transfer *xfer)
static unsigned int
-rt2880_spi_write_read(struct spi_device *spi, struct spi_transfer *xfer)
+rt2880_spi_write_read(struct spi_device *spi, struct list_head *list, struct spi_transfer *xfer)
{
struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
+ int cs = spi->chip_select;
unsigned count = 0;
u8 *rx = xfer->rx_buf;
const u8 *tx = xfer->tx_buf;
@@ -279,9 +335,9 @@ rt2880_spi_write_read(struct spi_device
@@ -213,9 +280,9 @@ rt2880_spi_write_read(struct spi_device
if (tx) {
for (count = 0; count < xfer->len; count++) {
@ -201,7 +202,7 @@
if (err) {
dev_err(&spi->dev, "TX failed, err=%d\n", err);
goto out;
@@ -291,13 +347,13 @@ rt2880_spi_write_read(struct spi_device
@@ -225,13 +292,13 @@ rt2880_spi_write_read(struct spi_device
if (rx) {
for (count = 0; count < xfer->len; count++) {
@ -218,42 +219,37 @@
}
}
@@ -364,7 +420,7 @@ mt7621_spi_write_read(struct spi_device
trans |= SPI_CTL_START;
rt2880_spi_write(rs, MT7621_SPI_TRANS, trans);
- mt7621_spi_wait_till_ready(rs);
+ mt7621_spi_wait_till_ready(spi);
if (rx) {
u32 data0 = rt2880_spi_read(rs, MT7621_SPI_DATA0);
@@ -440,7 +496,7 @@ static int rt2880_spi_transfer_one_messa
@@ -280,25 +347,25 @@ static int rt2880_spi_transfer_one_messa
}
if (!cs_active) {
- rs->ops->set_cs(rs, 1);
+ rs->ops->set_cs(spi, 1);
- rt2880_spi_set_cs(rs, 1);
+ rt2880_spi_set_cs(spi, 1);
cs_active = 1;
}
@@ -451,14 +507,14 @@ static int rt2880_spi_transfer_one_messa
if (t->len)
- m->actual_length += rt2880_spi_write_read(spi, t);
+ m->actual_length += rt2880_spi_write_read(spi, &m->transfers, t);
if (t->delay_usecs)
udelay(t->delay_usecs);
if (t->cs_change) {
- rs->ops->set_cs(rs, 0);
+ rs->ops->set_cs(spi, 0);
- rt2880_spi_set_cs(rs, 0);
+ rt2880_spi_set_cs(spi, 0);
cs_active = 0;
}
}
msg_done:
if (cs_active)
- rs->ops->set_cs(rs, 0);
+ rs->ops->set_cs(spi, 0);
- rt2880_spi_set_cs(rs, 0);
+ rt2880_spi_set_cs(spi, 0);
m->status = status;
spi_finalize_current_message(master);
@@ -471,7 +527,7 @@ static int rt2880_spi_setup(struct spi_d
@@ -311,7 +378,7 @@ static int rt2880_spi_setup(struct spi_d
struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
if ((spi->max_speed_hz == 0) ||
@ -262,7 +258,7 @@
spi->max_speed_hz = (rs->sys_freq / 2);
if (spi->max_speed_hz < (rs->sys_freq / 128)) {
@@ -488,10 +544,25 @@ static int rt2880_spi_setup(struct spi_d
@@ -328,14 +395,47 @@ static int rt2880_spi_setup(struct spi_d
static void rt2880_spi_reset(struct rt2880_spi *rs)
{
@ -272,8 +268,8 @@
SPICFG_SPICLK_DIV16 | SPICFG_SPICLKPOL);
- rt2880_spi_write(rs, RAMIPS_SPI_CTL, SPICTL_HIZSDO | SPICTL_SPIENA);
+ rt2880_spi_write(rs, RAMIPS_SPI_CTL(0), SPICTL_HIZSDO | SPICTL_SPIENA);
+}
+
}
+static void rt5350_spi_reset(struct rt2880_spi *rs)
+{
+ int cs;
@ -287,60 +283,45 @@
+ SPICFG_SPICLK_DIV16 | SPICFG_SPICLKPOL);
+ rt2880_spi_write(rs, RAMIPS_SPI_CTL(cs), SPICTL_HIZSDO | SPICTL_SPIENA);
+ }
}
static void mt7621_spi_reset(struct rt2880_spi *rs)
@@ -511,24 +582,33 @@ static struct rt2880_spi_ops spi_ops[] =
.set_cs = rt2880_spi_set_cs,
.baudrate_set = rt2880_spi_baudrate_set,
.write_read = rt2880_spi_write_read,
+}
+
+static struct rt2880_spi_ops spi_ops[] = {
+ {
+ .init_hw = rt2880_spi_reset,
+ .num_cs = 1,
+ }, {
+ .init_hw = rt5350_spi_reset,
+ .set_cs = rt2880_spi_set_cs,
+ .baudrate_set = rt2880_spi_baudrate_set,
+ .write_read = rt2880_spi_write_read,
+ .num_cs = 2,
}, {
.init_hw = mt7621_spi_reset,
.set_cs = mt7621_spi_set_cs,
.baudrate_set = mt7621_spi_baudrate_set,
.write_read = mt7621_spi_write_read,
+ .num_cs = 1,
},
};
static const struct of_device_id rt2880_spi_match[] = {
{ .compatible = "ralink,rt2880-spi", .data = &spi_ops[0]},
- { .compatible = "ralink,mt7621-spi", .data = &spi_ops[1] },
+ },
+};
+
+static const struct of_device_id rt2880_spi_match[] = {
+ { .compatible = "ralink,rt2880-spi", .data = &spi_ops[0]},
+ { .compatible = "ralink,rt5350-spi", .data = &spi_ops[1]},
+ { .compatible = "ralink,mt7621-spi", .data = &spi_ops[2] },
{},
};
MODULE_DEVICE_TABLE(of, rt2880_spi_match);
+ {},
+};
+MODULE_DEVICE_TABLE(of, rt2880_spi_match);
+
static int rt2880_spi_probe(struct platform_device *pdev)
{
- const struct of_device_id *match;
+ const struct of_device_id *match;
struct spi_master *master;
struct rt2880_spi *rs;
unsigned long flags;
@@ -536,10 +616,12 @@ static int rt2880_spi_probe(struct platf
@@ -343,6 +443,12 @@ static int rt2880_spi_probe(struct platf
struct resource *r;
int status = 0;
struct clk *clk;
+ struct rt2880_spi_ops *ops;
- match = of_match_device(rt2880_spi_match, &pdev->dev);
+
+ match = of_match_device(rt2880_spi_match, &pdev->dev);
if (!match)
return -EINVAL;
+ if (!match)
+ return -EINVAL;
+ ops = (struct rt2880_spi_ops *)match->data;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, r);
@@ -563,14 +645,13 @@ static int rt2880_spi_probe(struct platf
@@ -366,14 +472,13 @@ static int rt2880_spi_probe(struct platf
return -ENOMEM;
}
@ -357,12 +338,31 @@
dev_set_drvdata(&pdev->dev, master);
@@ -579,7 +660,7 @@ static int rt2880_spi_probe(struct platf
@@ -382,12 +487,13 @@ static int rt2880_spi_probe(struct platf
rs->clk = clk;
rs->master = master;
rs->sys_freq = clk_get_rate(rs->clk);
- rs->ops = (struct rt2880_spi_ops *) match->data;
+ rs->ops = ops;
dev_dbg(&pdev->dev, "sys_freq: %u\n", rs->sys_freq);
spin_lock_irqsave(&rs->lock, flags);
device_reset(&pdev->dev);
- rt2880_spi_reset(rs);
+ rs->ops->init_hw(rs);
return spi_register_master(master);
}
@@ -408,12 +514,6 @@ static int rt2880_spi_remove(struct plat
MODULE_ALIAS("platform:" DRIVER_NAME);
-static const struct of_device_id rt2880_spi_match[] = {
- { .compatible = "ralink,rt2880-spi" },
- {},
-};
-MODULE_DEVICE_TABLE(of, rt2880_spi_match);
-
static struct platform_driver rt2880_spi_driver = {
.driver = {
.name = DRIVER_NAME,

343
target/linux/ramips/patches-3.14/0061-SPI-ralink-add-mt7621-SoC-spi-driver.patch Normal file
View file

@ -0,0 +1,343 @@
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -396,6 +396,12 @@ config SPI_RT2880
help
This selects a driver for the Ralink RT288x/RT305x SPI Controller.
+config SPI_MT7621
+ tristate "MediaTek MT7621 SPI Controller"
+ depends on RALINK
+ help
+ This selects a driver for the MediaTek MT7621 SPI Controller.
+
config SPI_S3C24XX
tristate "Samsung S3C24XX series SPI"
depends on ARCH_S3C24XX
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_SPI_LM70_LLP) += spi-lm70l
obj-$(CONFIG_SPI_MPC512x_PSC) += spi-mpc512x-psc.o
obj-$(CONFIG_SPI_MPC52xx_PSC) += spi-mpc52xx-psc.o
obj-$(CONFIG_SPI_MPC52xx) += spi-mpc52xx.o
+obj-$(CONFIG_SPI_MT7621) += spi-mt7621.o
obj-$(CONFIG_SPI_MXS) += spi-mxs.o
obj-$(CONFIG_SPI_NUC900) += spi-nuc900.o
obj-$(CONFIG_SPI_OC_TINY) += spi-oc-tiny.o
--- /dev/null
+++ b/drivers/spi/spi-mt7621.c
@@ -0,0 +1,315 @@
+/*
+ * spi-mt7621.c -- MediaTek MT7621 SPI controller driver
+ *
+ * Copyright (C) 2011 Sergiy <piratfm@gmail.com>
+ * Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2014-2015 Felix Fietkau <nbd@openwrt.org>
+ *
+ * Some parts are based on spi-orion.c:
+ * Author: Shadi Ammouri <shadi@marvell.com>
+ * Copyright (C) 2007-2008 Marvell Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/reset.h>
+#include <linux/spi/spi.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/swab.h>
+
+#include <ralink_regs.h>
+
+#define SPI_BPW_MASK(bits) BIT((bits) - 1)
+
+#define DRIVER_NAME "spi-mt7621"
+/* in usec */
+#define RALINK_SPI_WAIT_MAX_LOOP 2000
+
+/* SPISTAT register bit field */
+#define SPISTAT_BUSY BIT(0)
+
+#define MT7621_SPI_TRANS 0x00
+#define SPITRANS_BUSY BIT(16)
+
+#define MT7621_SPI_OPCODE 0x04
+#define MT7621_SPI_DATA0 0x08
+#define SPI_CTL_TX_RX_CNT_MASK 0xff
+#define SPI_CTL_START BIT(8)
+
+#define MT7621_SPI_POLAR 0x38
+#define MT7621_SPI_MASTER 0x28
+#define MT7621_SPI_MOREBUF 0x2c
+#define MT7621_SPI_SPACE 0x3c
+
+#define RT2880_SPI_MODE_BITS (SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | SPI_CS_HIGH)
+
+struct mt7621_spi;
+
+struct mt7621_spi {
+ struct spi_master *master;
+ void __iomem *base;
+ unsigned int sys_freq;
+ unsigned int speed;
+ struct clk *clk;
+ spinlock_t lock;
+
+ struct mt7621_spi_ops *ops;
+};
+
+static inline struct mt7621_spi *spidev_to_mt7621_spi(struct spi_device *spi)
+{
+ return spi_master_get_devdata(spi->master);
+}
+
+static inline u32 mt7621_spi_read(struct mt7621_spi *rs, u32 reg)
+{
+ return ioread32(rs->base + reg);
+}
+
+static inline void mt7621_spi_write(struct mt7621_spi *rs, u32 reg, u32 val)
+{
+ iowrite32(val, rs->base + reg);
+}
+
+static void mt7621_spi_set_cs(struct spi_device *spi, int enable)
+{
+ struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);
+ u32 polar = mt7621_spi_read(rs, MT7621_SPI_POLAR);
+
+ if (enable)
+ polar |= 1;
+ else
+ polar &= ~1;
+ mt7621_spi_write(rs, MT7621_SPI_POLAR, polar);
+}
+
+static inline int mt7621_spi_wait_till_ready(struct spi_device *spi)
+{
+ struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);
+ int i;
+
+ for (i = 0; i < RALINK_SPI_WAIT_MAX_LOOP; i++) {
+ u32 status;
+
+ status = mt7621_spi_read(rs, MT7621_SPI_TRANS);
+ if ((status & SPITRANS_BUSY) == 0) {
+ return 0;
+ }
+ cpu_relax();
+ udelay(1);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int mt7621_spi_transfer_one_message(struct spi_master *master,
+ struct spi_message *m)
+{
+ struct mt7621_spi *rs = spi_master_get_devdata(master);
+ struct spi_device *spi = m->spi;
+ struct spi_transfer *t = NULL;
+ int status = 0;
+ int i, len = 0;
+ int rx_len = 0;
+ u32 data[9] = { 0 };
+ u32 val;
+
+ mt7621_spi_wait_till_ready(spi);
+
+ list_for_each_entry(t, &m->transfers, transfer_list) {
+ const u8 *buf = t->tx_buf;
+
+ if (t->rx_buf)
+ rx_len += t->len;
+
+ if (!buf)
+ continue;
+
+ if (WARN_ON(len + t->len > 36)) {
+ status = -EIO;
+ goto msg_done;
+ }
+
+ for (i = 0; i < t->len; i++, len++)
+ data[len / 4] |= buf[i] << (8 * (len & 3));
+ }
+
+ if (WARN_ON(rx_len > 32)) {
+ status = -EIO;
+ goto msg_done;
+ }
+
+ data[0] = swab32(data[0]);
+ if (len < 4)
+ data[0] >>= (4 - len) * 8;
+
+ for (i = 0; i < len; i += 4)
+ mt7621_spi_write(rs, MT7621_SPI_OPCODE + i, data[i / 4]);
+
+ val = (min_t(int, len, 4) * 8) << 24;
+ if (len > 4)
+ val |= (len - 4) * 8;
+ val |= (rx_len * 8) << 12;
+ mt7621_spi_write(rs, MT7621_SPI_MOREBUF, val);
+
+ mt7621_spi_set_cs(spi, 1);
+
+ val = mt7621_spi_read(rs, MT7621_SPI_TRANS);
+ val |= SPI_CTL_START;
+ mt7621_spi_write(rs, MT7621_SPI_TRANS, val);
+
+ mt7621_spi_wait_till_ready(spi);
+
+ mt7621_spi_set_cs(spi, 0);
+
+ for (i = 0; i < rx_len; i += 4)
+ data[i / 4] = mt7621_spi_read(rs, MT7621_SPI_DATA0 + i);
+
+ m->actual_length = len + rx_len;
+
+ len = 0;
+ list_for_each_entry(t, &m->transfers, transfer_list) {
+ u8 *buf = t->rx_buf;
+
+ if (!buf)
+ continue;
+
+ for (i = 0; i < t->len; i++, len++)
+ buf[i] = data[len / 4] >> (8 * (len & 3));
+ }
+
+msg_done:
+ m->status = status;
+ spi_finalize_current_message(master);
+
+ return 0;
+}
+
+static int mt7621_spi_setup(struct spi_device *spi)
+{
+ return 0;
+}
+
+static void mt7621_spi_reset(struct mt7621_spi *rs)
+{
+ u32 master = mt7621_spi_read(rs, MT7621_SPI_MASTER);
+
+ master &= ~(0xfff << 16);
+ master |= 13 << 16;
+ master |= 7 << 29;
+ master |= 1 << 2;
+
+ mt7621_spi_write(rs, MT7621_SPI_MASTER, master);
+}
+
+static const struct of_device_id mt7621_spi_match[] = {
+ { .compatible = "ralink,mt7621-spi" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mt7621_spi_match);
+
+static int mt7621_spi_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ struct spi_master *master;
+ struct mt7621_spi *rs;
+ unsigned long flags;
+ void __iomem *base;
+ struct resource *r;
+ int status = 0;
+ struct clk *clk;
+ struct mt7621_spi_ops *ops;
+
+ match = of_match_device(mt7621_spi_match, &pdev->dev);
+ if (!match)
+ return -EINVAL;
+ ops = (struct mt7621_spi_ops *)match->data;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "unable to get SYS clock, err=%d\n",
+ status);
+ return PTR_ERR(clk);
+ }
+
+ status = clk_prepare_enable(clk);
+ if (status)
+ return status;
+
+ master = spi_alloc_master(&pdev->dev, sizeof(*rs));
+ if (master == NULL) {
+ dev_dbg(&pdev->dev, "master allocation failed\n");
+ return -ENOMEM;
+ }
+
+ master->mode_bits = RT2880_SPI_MODE_BITS;
+
+ master->setup = mt7621_spi_setup;
+ master->transfer_one_message = mt7621_spi_transfer_one_message;
+ master->bits_per_word_mask = SPI_BPW_MASK(8);
+ master->dev.of_node = pdev->dev.of_node;
+ master->num_chipselect = 1;
+
+ dev_set_drvdata(&pdev->dev, master);
+
+ rs = spi_master_get_devdata(master);
+ rs->base = base;
+ rs->clk = clk;
+ rs->master = master;
+ rs->sys_freq = clk_get_rate(rs->clk);
+ rs->ops = ops;
+ dev_dbg(&pdev->dev, "sys_freq: %u\n", rs->sys_freq);
+ spin_lock_irqsave(&rs->lock, flags);
+
+ device_reset(&pdev->dev);
+
+ mt7621_spi_reset(rs);
+
+ return spi_register_master(master);
+}
+
+static int mt7621_spi_remove(struct platform_device *pdev)
+{
+ struct spi_master *master;
+ struct mt7621_spi *rs;
+
+ master = dev_get_drvdata(&pdev->dev);
+ rs = spi_master_get_devdata(master);
+
+ clk_disable(rs->clk);
+ spi_unregister_master(master);
+
+ return 0;
+}
+
+MODULE_ALIAS("platform:" DRIVER_NAME);
+
+static struct platform_driver mt7621_spi_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = mt7621_spi_match,
+ },
+ .probe = mt7621_spi_probe,
+ .remove = mt7621_spi_remove,
+};
+
+module_platform_driver(mt7621_spi_driver);
+
+MODULE_DESCRIPTION("MT7621 SPI driver");
+MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
+MODULE_LICENSE("GPL");

1
target/linux/ramips/rt288x/config-3.14
View file

@ -152,6 +152,7 @@ CONFIG_SOC_RT288X=y
# CONFIG_SOC_RT3883 is not set
CONFIG_SPI=y
CONFIG_SPI_MASTER=y
# CONFIG_SPI_MT7621 is not set
CONFIG_SPI_RT2880=y
CONFIG_SWCONFIG=y
CONFIG_SYS_HAS_CPU_MIPS32_R1=y

1
target/linux/ramips/rt305x/config-3.14
View file

@ -151,6 +151,7 @@ CONFIG_SOC_RT305X=y
# CONFIG_SOC_RT3883 is not set
CONFIG_SPI=y
CONFIG_SPI_MASTER=y
# CONFIG_SPI_MT7621 is not set
CONFIG_SPI_RT2880=y
CONFIG_SWCONFIG=y
CONFIG_SYS_HAS_CPU_MIPS32_R1=y

1
target/linux/ramips/rt3883/config-3.14
View file

@ -162,6 +162,7 @@ CONFIG_SLUB=y
CONFIG_SOC_RT3883=y
CONFIG_SPI=y
CONFIG_SPI_MASTER=y
# CONFIG_SPI_MT7621 is not set
CONFIG_SPI_RT2880=y
CONFIG_SWCONFIG=y
CONFIG_SYS_HAS_CPU_MIPS32_R1=y