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Commit f588af84 authored by David S. Miller's avatar David S. Miller
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Merge tag 'linux-can-next-for-5.4-20190820' of... 

Merge tag 'linux-can-next-for-5.4-20190820' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2019-08-20

this is a pull request for net-next/master consisting of 18 patches.

The first patch is by Geert Uytterhoeven, it removes the unused platform
data support from the rcar_can driver.

A patch by Nishka Dasgupta marks the structure peak_pciec_i2c_bit_ops in
the peak_pci driver as constant.

A patch by me removes the custom DMA support from the hi311x driver.

The next 4 patches target the tcan4x5x driver and are also by me, they
first clean up the driver a bit, and then add missing error handling and
fix a bug in the length calculation in the regmap callbacks.

The next 2 patches are by me for the m_can_platform driver, they also
remove unneeded casts and add missing error handling.

The remaining 9 patches all target the mcp251x driver. The first 5 are
clean up patches by me, the next relaxes the timing in the
mcp251x_hw_reset() function. Alexander Shiyan's patch improves the name
which is used while registering the interrupt handler. Phil Elwell's
patch improves the mcp251x_open() function to use the DT-supplied
interrupt flags instead of hard coding them. The final patch is again by
me, it removes the custom DMA support from the hi311x driver.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents c08129bb df58525d
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Showing with 83 additions and 182 deletions
drivers/net/can/m_can/m_can_platform.c
View file @ f588af84
......@@ -16,24 +16,21 @@ struct m_can_plat_priv {
static u32 iomap_read_reg(struct m_can_classdev *cdev, int reg)
{
struct m_can_plat_priv *priv =
(struct m_can_plat_priv *)cdev->device_data;
struct m_can_plat_priv *priv = cdev->device_data;
return readl(priv->base + reg);
}
static u32 iomap_read_fifo(struct m_can_classdev *cdev, int offset)
{
struct m_can_plat_priv *priv =
(struct m_can_plat_priv *)cdev->device_data;
struct m_can_plat_priv *priv = cdev->device_data;
return readl(priv->mram_base + offset);
}
static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
{
struct m_can_plat_priv *priv =
(struct m_can_plat_priv *)cdev->device_data;
struct m_can_plat_priv *priv = cdev->device_data;
writel(val, priv->base + reg);
......@@ -42,8 +39,7 @@ static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
static int iomap_write_fifo(struct m_can_classdev *cdev, int offset, int val)
{
struct m_can_plat_priv *priv =
(struct m_can_plat_priv *)cdev->device_data;
struct m_can_plat_priv *priv = cdev->device_data;
writel(val, priv->mram_base + offset);
......@@ -67,6 +63,9 @@ static int m_can_plat_probe(struct platform_device *pdev)
int irq, ret = 0;
mcan_class = m_can_class_allocate_dev(&pdev->dev);
if (!mcan_class)
return -ENOMEM;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
......
drivers/net/can/m_can/tcan4x5x.c
View file @ f588af84
......@@ -113,7 +113,6 @@
struct tcan4x5x_priv {
struct regmap *regmap;
struct spi_device *spi;
struct mutex tcan4x5x_lock; /* SPI device lock */
struct m_can_classdev *mcan_dev;
......@@ -179,7 +178,7 @@ static int regmap_spi_gather_write(void *context, const void *reg,
{ .tx_buf = val, .len = val_len, },
};
addr = TCAN4X5X_WRITE_CMD | (*((u16 *)reg) << 8) | val_len >> 3;
addr = TCAN4X5X_WRITE_CMD | (*((u16 *)reg) << 8) | val_len >> 2;
spi_message_init(&m);
spi_message_add_tail(&t[0], &m);
......@@ -193,7 +192,7 @@ static int tcan4x5x_regmap_write(void *context, const void *data, size_t count)
u16 *reg = (u16 *)(data);
const u32 *val = data + 4;
return regmap_spi_gather_write(context, reg, 4, val, count);
return regmap_spi_gather_write(context, reg, 4, val, count - 4);
}
static int regmap_spi_async_write(void *context,
......@@ -234,7 +233,7 @@ static struct regmap_bus tcan4x5x_bus = {
static u32 tcan4x5x_read_reg(struct m_can_classdev *cdev, int reg)
{
struct tcan4x5x_priv *priv = (struct tcan4x5x_priv *)cdev->device_data;
struct tcan4x5x_priv *priv = cdev->device_data;
u32 val;
tcan4x5x_check_wake(priv);
......@@ -246,7 +245,7 @@ static u32 tcan4x5x_read_reg(struct m_can_classdev *cdev, int reg)
static u32 tcan4x5x_read_fifo(struct m_can_classdev *cdev, int addr_offset)
{
struct tcan4x5x_priv *priv = (struct tcan4x5x_priv *)cdev->device_data;
struct tcan4x5x_priv *priv = cdev->device_data;
u32 val;
tcan4x5x_check_wake(priv);
......@@ -258,7 +257,7 @@ static u32 tcan4x5x_read_fifo(struct m_can_classdev *cdev, int addr_offset)
static int tcan4x5x_write_reg(struct m_can_classdev *cdev, int reg, int val)
{
struct tcan4x5x_priv *priv = (struct tcan4x5x_priv *)cdev->device_data;
struct tcan4x5x_priv *priv = cdev->device_data;
tcan4x5x_check_wake(priv);
......@@ -268,8 +267,7 @@ static int tcan4x5x_write_reg(struct m_can_classdev *cdev, int reg, int val)
static int tcan4x5x_write_fifo(struct m_can_classdev *cdev,
int addr_offset, int val)
{
struct tcan4x5x_priv *priv =
(struct tcan4x5x_priv *)cdev->device_data;
struct tcan4x5x_priv *priv = cdev->device_data;
tcan4x5x_check_wake(priv);
......@@ -290,8 +288,7 @@ static int tcan4x5x_power_enable(struct regulator *reg, int enable)
static int tcan4x5x_write_tcan_reg(struct m_can_classdev *cdev,
int reg, int val)
{
struct tcan4x5x_priv *priv =
(struct tcan4x5x_priv *)cdev->device_data;
struct tcan4x5x_priv *priv = cdev->device_data;
tcan4x5x_check_wake(priv);
......@@ -300,8 +297,7 @@ static int tcan4x5x_write_tcan_reg(struct m_can_classdev *cdev,
static int tcan4x5x_clear_interrupts(struct m_can_classdev *cdev)
{
struct tcan4x5x_priv *tcan4x5x =
(struct tcan4x5x_priv *)cdev->device_data;
struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
int ret;
tcan4x5x_check_wake(tcan4x5x);
......@@ -331,8 +327,7 @@ static int tcan4x5x_clear_interrupts(struct m_can_classdev *cdev)
static int tcan4x5x_init(struct m_can_classdev *cdev)
{
struct tcan4x5x_priv *tcan4x5x =
(struct tcan4x5x_priv *)cdev->device_data;
struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
int ret;
tcan4x5x_check_wake(tcan4x5x);
......@@ -359,8 +354,7 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
static int tcan4x5x_parse_config(struct m_can_classdev *cdev)
{
struct tcan4x5x_priv *tcan4x5x =
(struct tcan4x5x_priv *)cdev->device_data;
struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
tcan4x5x->interrupt_gpio = devm_gpiod_get(cdev->dev, "data-ready",
GPIOD_IN);
......@@ -420,6 +414,9 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
int freq, ret;
mcan_class = m_can_class_allocate_dev(&spi->dev);
if (!mcan_class)
return -ENOMEM;
priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
......@@ -466,8 +463,6 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
priv->regmap = devm_regmap_init(&spi->dev, &tcan4x5x_bus,
&spi->dev, &tcan4x5x_regmap);
mutex_init(&priv->tcan4x5x_lock);
tcan4x5x_power_enable(priv->power, 1);
ret = m_can_class_register(mcan_class);
......
drivers/net/can/rcar/rcar_can.c
View file @ f588af84
......@@ -15,11 +15,17 @@
#include <linux/can/led.h>
#include <linux/can/dev.h>
#include <linux/clk.h>
#include <linux/can/platform/rcar_can.h>
#include <linux/of.h>
#define RCAR_CAN_DRV_NAME "rcar_can"
/* Clock Select Register settings */
enum CLKR {
CLKR_CLKP1 = 0, /* Peripheral clock (clkp1) */
CLKR_CLKP2 = 1, /* Peripheral clock (clkp2) */
CLKR_CLKEXT = 3, /* Externally input clock */
};
#define RCAR_SUPPORTED_CLOCKS (BIT(CLKR_CLKP1) | BIT(CLKR_CLKP2) | \
BIT(CLKR_CLKEXT))
......@@ -736,7 +742,6 @@ static const char * const clock_names[] = {
static int rcar_can_probe(struct platform_device *pdev)
{
struct rcar_can_platform_data *pdata;
struct rcar_can_priv *priv;
struct net_device *ndev;
struct resource *mem;
......@@ -745,17 +750,8 @@ static int rcar_can_probe(struct platform_device *pdev)
int err = -ENODEV;
int irq;
if (pdev->dev.of_node) {
of_property_read_u32(pdev->dev.of_node,
"renesas,can-clock-select", &clock_select);
} else {
pdata = dev_get_platdata(&pdev->dev);
if (!pdata) {
dev_err(&pdev->dev, "No platform data provided!\n");
goto fail;
}
clock_select = pdata->clock_select;
}
of_property_read_u32(pdev->dev.of_node, "renesas,can-clock-select",
&clock_select);
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
......
drivers/net/can/sja1000/peak_pci.c
View file @ f588af84
......@@ -417,7 +417,7 @@ static void peak_pciec_write_reg(const struct sja1000_priv *priv,
peak_pci_write_reg(priv, port, val);
}
static struct i2c_algo_bit_data peak_pciec_i2c_bit_ops = {
static const struct i2c_algo_bit_data peak_pciec_i2c_bit_ops = {
.setsda = pita_setsda,
.setscl = pita_setscl,
.getsda = pita_getsda,
......
drivers/net/can/spi/hi311x.c
View file @ f588af84
......@@ -21,7 +21,6 @@
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/freezer.h>
#include <linux/interrupt.h>
#include <linux/io.h>
......@@ -126,10 +125,6 @@
#define DEVICE_NAME "hi3110"
static int hi3110_enable_dma = 1; /* Enable SPI DMA. Default: 1 (On) */
module_param(hi3110_enable_dma, int, 0444);
MODULE_PARM_DESC(hi3110_enable_dma, "Enable SPI DMA. Default: 1 (On)");
static const struct can_bittiming_const hi3110_bittiming_const = {
.name = DEVICE_NAME,
.tseg1_min = 2,
......@@ -156,8 +151,6 @@ struct hi3110_priv {
u8 *spi_tx_buf;
u8 *spi_rx_buf;
dma_addr_t spi_tx_dma;
dma_addr_t spi_rx_dma;
struct sk_buff *tx_skb;
int tx_len;
......@@ -217,13 +210,6 @@ static int hi3110_spi_trans(struct spi_device *spi, int len)
int ret;
spi_message_init(&m);
if (hi3110_enable_dma) {
t.tx_dma = priv->spi_tx_dma;
t.rx_dma = priv->spi_rx_dma;
m.is_dma_mapped = 1;
}
spi_message_add_tail(&t, &m);
ret = spi_sync(spi, &m);
......@@ -915,30 +901,6 @@ static int hi3110_can_probe(struct spi_device *spi)
priv->spi = spi;
mutex_init(&priv->hi3110_lock);
/* If requested, allocate DMA buffers */
if (hi3110_enable_dma) {
spi->dev.coherent_dma_mask = ~0;
/* Minimum coherent DMA allocation is PAGE_SIZE, so allocate
* that much and share it between Tx and Rx DMA buffers.
*/
priv->spi_tx_buf = dmam_alloc_coherent(&spi->dev,
PAGE_SIZE,
&priv->spi_tx_dma,
GFP_DMA);
if (priv->spi_tx_buf) {
priv->spi_rx_buf = (priv->spi_tx_buf + (PAGE_SIZE / 2));
priv->spi_rx_dma = (dma_addr_t)(priv->spi_tx_dma +
(PAGE_SIZE / 2));
} else {
/* Fall back to non-DMA */
hi3110_enable_dma = 0;
}
}
/* Allocate non-DMA buffers */
if (!hi3110_enable_dma) {
priv->spi_tx_buf = devm_kzalloc(&spi->dev, HI3110_RX_BUF_LEN,
GFP_KERNEL);
if (!priv->spi_tx_buf) {
......@@ -952,7 +914,6 @@ static int hi3110_can_probe(struct spi_device *spi)
ret = -ENOMEM;
goto error_probe;
}
}
SET_NETDEV_DEV(net, &spi->dev);
......
drivers/net/can/spi/mcp251x.c
View file @ f588af84
// SPDX-License-Identifier: GPL-2.0-only
/*
* CAN bus driver for Microchip 251x/25625 CAN Controller with SPI Interface
/* CAN bus driver for Microchip 251x/25625 CAN Controller with SPI Interface
*
* MCP2510 support and bug fixes by Christian Pellegrin
* <chripell@evolware.org>
......@@ -48,7 +47,6 @@
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/freezer.h>
#include <linux/interrupt.h>
#include <linux/io.h>
......@@ -75,7 +73,6 @@
#define RTS_TXB2 0x04
#define INSTRUCTION_RTS(n) (0x80 | ((n) & 0x07))
/* MPC251x registers */
#define CANSTAT 0x0e
#define CANCTRL 0x0f
......@@ -191,8 +188,7 @@
#define SET_BYTE(val, byte) \
(((val) & 0xff) << ((byte) * 8))
/*
* Buffer size required for the largest SPI transfer (i.e., reading a
/* Buffer size required for the largest SPI transfer (i.e., reading a
* frame)
*/
#define CAN_FRAME_MAX_DATA_LEN 8
......@@ -205,10 +201,6 @@
#define DEVICE_NAME "mcp251x"
static int mcp251x_enable_dma; /* Enable SPI DMA. Default: 0 (Off) */
module_param(mcp251x_enable_dma, int, 0444);
MODULE_PARM_DESC(mcp251x_enable_dma, "Enable SPI DMA. Default: 0 (Off)");
static const struct can_bittiming_const mcp251x_bittiming_const = {
.name = DEVICE_NAME,
.tseg1_min = 3,
......@@ -237,8 +229,6 @@ struct mcp251x_priv {
u8 *spi_tx_buf;
u8 *spi_rx_buf;
dma_addr_t spi_tx_dma;
dma_addr_t spi_rx_dma;
struct sk_buff *tx_skb;
int tx_len;
......@@ -282,8 +272,7 @@ static void mcp251x_clean(struct net_device *net)
priv->tx_len = 0;
}
/*
* Note about handling of error return of mcp251x_spi_trans: accessing
/* Note about handling of error return of mcp251x_spi_trans: accessing
* registers via SPI is not really different conceptually than using
* normal I/O assembler instructions, although it's much more
* complicated from a practical POV. So it's not advisable to always
......@@ -308,13 +297,6 @@ static int mcp251x_spi_trans(struct spi_device *spi, int len)
int ret;
spi_message_init(&m);
if (mcp251x_enable_dma) {
t.tx_dma = priv->spi_tx_dma;
t.rx_dma = priv->spi_rx_dma;
m.is_dma_mapped = 1;
}
spi_message_add_tail(&t, &m);
ret = spi_sync(spi, &m);
......@@ -323,7 +305,7 @@ static int mcp251x_spi_trans(struct spi_device *spi, int len)
return ret;
}
static u8 mcp251x_read_reg(struct spi_device *spi, uint8_t reg)
static u8 mcp251x_read_reg(struct spi_device *spi, u8 reg)
{
struct mcp251x_priv *priv = spi_get_drvdata(spi);
u8 val = 0;
......@@ -337,8 +319,7 @@ static u8 mcp251x_read_reg(struct spi_device *spi, uint8_t reg)
return val;
}
static void mcp251x_read_2regs(struct spi_device *spi, uint8_t reg,
uint8_t *v1, uint8_t *v2)
static void mcp251x_read_2regs(struct spi_device *spi, u8 reg, u8 *v1, u8 *v2)
{
struct mcp251x_priv *priv = spi_get_drvdata(spi);
......@@ -351,7 +332,7 @@ static void mcp251x_read_2regs(struct spi_device *spi, uint8_t reg,
*v2 = priv->spi_rx_buf[3];
}
static void mcp251x_write_reg(struct spi_device *spi, u8 reg, uint8_t val)
static void mcp251x_write_reg(struct spi_device *spi, u8 reg, u8 val)
{
struct mcp251x_priv *priv = spi_get_drvdata(spi);
......@@ -363,7 +344,7 @@ static void mcp251x_write_reg(struct spi_device *spi, u8 reg, uint8_t val)
}
static void mcp251x_write_bits(struct spi_device *spi, u8 reg,
u8 mask, uint8_t val)
u8 mask, u8 val)
{
struct mcp251x_priv *priv = spi_get_drvdata(spi);
......@@ -565,8 +546,7 @@ static int mcp251x_set_normal_mode(struct spi_device *spi)
while (mcp251x_read_reg(spi, CANSTAT) & CANCTRL_REQOP_MASK) {
schedule();
if (time_after(jiffies, timeout)) {
dev_err(&spi->dev, "MCP251x didn't"
" enter in normal mode\n");
dev_err(&spi->dev, "MCP251x didn't enter in normal mode\n");
return -EBUSY;
}
}
......@@ -612,7 +592,7 @@ static int mcp251x_setup(struct net_device *net, struct spi_device *spi)
static int mcp251x_hw_reset(struct spi_device *spi)
{
struct mcp251x_priv *priv = spi_get_drvdata(spi);
u8 reg;
unsigned long timeout;
int ret;
/* Wait for oscillator startup timer after power up */
......@@ -626,10 +606,19 @@ static int mcp251x_hw_reset(struct spi_device *spi)
/* Wait for oscillator startup timer after reset */
mdelay(MCP251X_OST_DELAY_MS);
reg = mcp251x_read_reg(spi, CANSTAT);
if ((reg & CANCTRL_REQOP_MASK) != CANCTRL_REQOP_CONF)
return -ENODEV;
/* Wait for reset to finish */
timeout = jiffies + HZ;
while ((mcp251x_read_reg(spi, CANSTAT) & CANCTRL_REQOP_MASK) !=
CANCTRL_REQOP_CONF) {
usleep_range(MCP251X_OST_DELAY_MS * 1000,
MCP251X_OST_DELAY_MS * 1000 * 2);
if (time_after(jiffies, timeout)) {
dev_err(&spi->dev,
"MCP251x didn't enter in conf mode after reset\n");
return -EBUSY;
}
}
return 0;
}
......@@ -799,7 +788,8 @@ static irqreturn_t mcp251x_can_ist(int irq, void *dev_id)
* (The MCP2515/25625 does this automatically.)
*/
if (mcp251x_is_2510(spi))
mcp251x_write_bits(spi, CANINTF, CANINTF_RX0IF, 0x00);
mcp251x_write_bits(spi, CANINTF,
CANINTF_RX0IF, 0x00);
}
/* receive buffer 1 */
......@@ -900,7 +890,6 @@ static irqreturn_t mcp251x_can_ist(int irq, void *dev_id)
}
netif_wake_queue(net);
}
}
mutex_unlock(&priv->mcp_lock);
return IRQ_HANDLED;
......@@ -910,7 +899,7 @@ static int mcp251x_open(struct net_device *net)
{
struct mcp251x_priv *priv = netdev_priv(net);
struct spi_device *spi = priv->spi;
unsigned long flags = IRQF_ONESHOT | IRQF_TRIGGER_FALLING;
unsigned long flags = 0;
int ret;
ret = open_candev(net);
......@@ -926,8 +915,12 @@ static int mcp251x_open(struct net_device *net)
priv->tx_skb = NULL;
priv->tx_len = 0;
if (!spi->dev.of_node)
flags = IRQF_TRIGGER_FALLING;
ret = request_threaded_irq(spi->irq, NULL, mcp251x_can_ist,
flags | IRQF_ONESHOT, DEVICE_NAME, priv);
flags | IRQF_ONESHOT, dev_name(&spi->dev),
priv);
if (ret) {
dev_err(&spi->dev, "failed to acquire irq %d\n", spi->irq);
goto out_close;
......@@ -1090,44 +1083,19 @@ static int mcp251x_can_probe(struct spi_device *spi)
priv->spi = spi;
mutex_init(&priv->mcp_lock);
/* If requested, allocate DMA buffers */
if (mcp251x_enable_dma) {
spi->dev.coherent_dma_mask = ~0;
/*
* Minimum coherent DMA allocation is PAGE_SIZE, so allocate
* that much and share it between Tx and Rx DMA buffers.
*/
priv->spi_tx_buf = dmam_alloc_coherent(&spi->dev,
PAGE_SIZE,
&priv->spi_tx_dma,
GFP_DMA);
if (priv->spi_tx_buf) {
priv->spi_rx_buf = (priv->spi_tx_buf + (PAGE_SIZE / 2));
priv->spi_rx_dma = (dma_addr_t)(priv->spi_tx_dma +
(PAGE_SIZE / 2));
} else {
/* Fall back to non-DMA */
mcp251x_enable_dma = 0;
}
}
/* Allocate non-DMA buffers */
if (!mcp251x_enable_dma) {
priv->spi_tx_buf = devm_kzalloc(&spi->dev, SPI_TRANSFER_BUF_LEN,
GFP_KERNEL);
if (!priv->spi_tx_buf) {
ret = -ENOMEM;
goto error_probe;
}
priv->spi_rx_buf = devm_kzalloc(&spi->dev, SPI_TRANSFER_BUF_LEN,
GFP_KERNEL);
if (!priv->spi_rx_buf) {
ret = -ENOMEM;
goto error_probe;
}
}
SET_NETDEV_DEV(net, &spi->dev);
......@@ -1135,7 +1103,8 @@ static int mcp251x_can_probe(struct spi_device *spi)
ret = mcp251x_hw_probe(spi);
if (ret) {
if (ret == -ENODEV)
dev_err(&spi->dev, "Cannot initialize MCP%x. Wrong wiring?\n", priv->model);
dev_err(&spi->dev, "Cannot initialize MCP%x. Wrong wiring?\n",
priv->model);
goto error_probe;
}
......@@ -1189,8 +1158,7 @@ static int __maybe_unused mcp251x_can_suspend(struct device *dev)
priv->force_quit = 1;
disable_irq(spi->irq);
/*
* Note: at this point neither IST nor workqueues are running.
/* Note: at this point neither IST nor workqueues are running.
* open/stop cannot be called anyway so locking is not needed
*/
if (netif_running(net)) {
......
include/linux/can/platform/rcar_can.h deleted 100644 → 0
View file @ c08129bb
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _CAN_PLATFORM_RCAR_CAN_H_
#define _CAN_PLATFORM_RCAR_CAN_H_
#include <linux/types.h>
/* Clock Select Register settings */
enum CLKR {
CLKR_CLKP1 = 0, /* Peripheral clock (clkp1) */
CLKR_CLKP2 = 1, /* Peripheral clock (clkp2) */
CLKR_CLKEXT = 3 /* Externally input clock */
};
struct rcar_can_platform_data {
enum CLKR clock_select; /* Clock source select */
};
#endif /* !_CAN_PLATFORM_RCAR_CAN_H_ */
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