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linuxdebug/drivers/memstick/host/jmb38x_ms.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* jmb38x_ms.c - JMicron jmb38x MemoryStick card reader
*
* Copyright (C) 2008 Alex Dubov <oakad@yahoo.com>
*/
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/highmem.h>
#include <linux/memstick.h>
#include <linux/slab.h>
#include <linux/module.h>
#define DRIVER_NAME "jmb38x_ms"
static bool no_dma;
module_param(no_dma, bool, 0644);
enum {
DMA_ADDRESS = 0x00,
BLOCK = 0x04,
DMA_CONTROL = 0x08,
TPC_P0 = 0x0c,
TPC_P1 = 0x10,
TPC = 0x14,
HOST_CONTROL = 0x18,
DATA = 0x1c,
STATUS = 0x20,
INT_STATUS = 0x24,
INT_STATUS_ENABLE = 0x28,
INT_SIGNAL_ENABLE = 0x2c,
TIMER = 0x30,
TIMER_CONTROL = 0x34,
PAD_OUTPUT_ENABLE = 0x38,
PAD_PU_PD = 0x3c,
CLOCK_DELAY = 0x40,
ADMA_ADDRESS = 0x44,
CLOCK_CONTROL = 0x48,
LED_CONTROL = 0x4c,
VERSION = 0x50
};
struct jmb38x_ms_host {
struct jmb38x_ms *chip;
void __iomem *addr;
spinlock_t lock;
struct tasklet_struct notify;
int id;
char host_id[32];
int irq;
unsigned int block_pos;
unsigned long timeout_jiffies;
struct timer_list timer;
struct memstick_host *msh;
struct memstick_request *req;
unsigned char cmd_flags;
unsigned char io_pos;
unsigned char ifmode;
unsigned int io_word[2];
};
struct jmb38x_ms {
struct pci_dev *pdev;
int host_cnt;
struct memstick_host *hosts[];
};
#define BLOCK_COUNT_MASK 0xffff0000
#define BLOCK_SIZE_MASK 0x00000fff
#define DMA_CONTROL_ENABLE 0x00000001
#define TPC_DATA_SEL 0x00008000
#define TPC_DIR 0x00004000
#define TPC_WAIT_INT 0x00002000
#define TPC_GET_INT 0x00000800
#define TPC_CODE_SZ_MASK 0x00000700
#define TPC_DATA_SZ_MASK 0x00000007
#define HOST_CONTROL_TDELAY_EN 0x00040000
#define HOST_CONTROL_HW_OC_P 0x00010000
#define HOST_CONTROL_RESET_REQ 0x00008000
#define HOST_CONTROL_REI 0x00004000
#define HOST_CONTROL_LED 0x00000400
#define HOST_CONTROL_FAST_CLK 0x00000200
#define HOST_CONTROL_RESET 0x00000100
#define HOST_CONTROL_POWER_EN 0x00000080
#define HOST_CONTROL_CLOCK_EN 0x00000040
#define HOST_CONTROL_REO 0x00000008
#define HOST_CONTROL_IF_SHIFT 4
#define HOST_CONTROL_IF_SERIAL 0x0
#define HOST_CONTROL_IF_PAR4 0x1
#define HOST_CONTROL_IF_PAR8 0x3
#define STATUS_BUSY 0x00080000
#define STATUS_MS_DAT7 0x00040000
#define STATUS_MS_DAT6 0x00020000
#define STATUS_MS_DAT5 0x00010000
#define STATUS_MS_DAT4 0x00008000
#define STATUS_MS_DAT3 0x00004000
#define STATUS_MS_DAT2 0x00002000
#define STATUS_MS_DAT1 0x00001000
#define STATUS_MS_DAT0 0x00000800
#define STATUS_HAS_MEDIA 0x00000400
#define STATUS_FIFO_EMPTY 0x00000200
#define STATUS_FIFO_FULL 0x00000100
#define STATUS_MS_CED 0x00000080
#define STATUS_MS_ERR 0x00000040
#define STATUS_MS_BRQ 0x00000020
#define STATUS_MS_CNK 0x00000001
#define INT_STATUS_TPC_ERR 0x00080000
#define INT_STATUS_CRC_ERR 0x00040000
#define INT_STATUS_TIMER_TO 0x00020000
#define INT_STATUS_HSK_TO 0x00010000
#define INT_STATUS_ANY_ERR 0x00008000
#define INT_STATUS_FIFO_WRDY 0x00000080
#define INT_STATUS_FIFO_RRDY 0x00000040
#define INT_STATUS_MEDIA_OUT 0x00000010
#define INT_STATUS_MEDIA_IN 0x00000008
#define INT_STATUS_DMA_BOUNDARY 0x00000004
#define INT_STATUS_EOTRAN 0x00000002
#define INT_STATUS_EOTPC 0x00000001
#define INT_STATUS_ALL 0x000f801f
#define PAD_OUTPUT_ENABLE_MS 0x0F3F
#define PAD_PU_PD_OFF 0x7FFF0000
#define PAD_PU_PD_ON_MS_SOCK0 0x5f8f0000
#define PAD_PU_PD_ON_MS_SOCK1 0x0f0f0000
#define CLOCK_CONTROL_BY_MMIO 0x00000008
#define CLOCK_CONTROL_40MHZ 0x00000001
#define CLOCK_CONTROL_50MHZ 0x00000002
#define CLOCK_CONTROL_60MHZ 0x00000010
#define CLOCK_CONTROL_62_5MHZ 0x00000004
#define CLOCK_CONTROL_OFF 0x00000000
#define PCI_CTL_CLOCK_DLY_ADDR 0x000000b0
enum {
CMD_READY = 0x01,
FIFO_READY = 0x02,
REG_DATA = 0x04,
DMA_DATA = 0x08
};
static unsigned int jmb38x_ms_read_data(struct jmb38x_ms_host *host,
unsigned char *buf, unsigned int length)
{
unsigned int off = 0;
while (host->io_pos && length) {
buf[off++] = host->io_word[0] & 0xff;
host->io_word[0] >>= 8;
length--;
host->io_pos--;
}
if (!length)
return off;
while (!(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
if (length < 4)
break;
*(unsigned int *)(buf + off) = __raw_readl(host->addr + DATA);
length -= 4;
off += 4;
}
if (length
&& !(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
host->io_word[0] = readl(host->addr + DATA);
for (host->io_pos = 4; host->io_pos; --host->io_pos) {
buf[off++] = host->io_word[0] & 0xff;
host->io_word[0] >>= 8;
length--;
if (!length)
break;
}
}
return off;
}
static unsigned int jmb38x_ms_read_reg_data(struct jmb38x_ms_host *host,
unsigned char *buf,
unsigned int length)
{
unsigned int off = 0;
while (host->io_pos > 4 && length) {
buf[off++] = host->io_word[0] & 0xff;
host->io_word[0] >>= 8;
length--;
host->io_pos--;
}
if (!length)
return off;
while (host->io_pos && length) {
buf[off++] = host->io_word[1] & 0xff;
host->io_word[1] >>= 8;
length--;
host->io_pos--;
}
return off;
}
static unsigned int jmb38x_ms_write_data(struct jmb38x_ms_host *host,
unsigned char *buf,
unsigned int length)
{
unsigned int off = 0;
if (host->io_pos) {
while (host->io_pos < 4 && length) {
host->io_word[0] |= buf[off++] << (host->io_pos * 8);
host->io_pos++;
length--;
}
}
if (host->io_pos == 4
&& !(STATUS_FIFO_FULL & readl(host->addr + STATUS))) {
writel(host->io_word[0], host->addr + DATA);
host->io_pos = 0;
host->io_word[0] = 0;
} else if (host->io_pos) {
return off;
}
if (!length)
return off;
while (!(STATUS_FIFO_FULL & readl(host->addr + STATUS))) {
if (length < 4)
break;
__raw_writel(*(unsigned int *)(buf + off),
host->addr + DATA);
length -= 4;
off += 4;
}
switch (length) {
case 3:
host->io_word[0] |= buf[off + 2] << 16;
host->io_pos++;
fallthrough;
case 2:
host->io_word[0] |= buf[off + 1] << 8;
host->io_pos++;
fallthrough;
case 1:
host->io_word[0] |= buf[off];
host->io_pos++;
}
off += host->io_pos;
return off;
}
static unsigned int jmb38x_ms_write_reg_data(struct jmb38x_ms_host *host,
unsigned char *buf,
unsigned int length)
{
unsigned int off = 0;
while (host->io_pos < 4 && length) {
host->io_word[0] &= ~(0xff << (host->io_pos * 8));
host->io_word[0] |= buf[off++] << (host->io_pos * 8);
host->io_pos++;
length--;
}
if (!length)
return off;
while (host->io_pos < 8 && length) {
host->io_word[1] &= ~(0xff << (host->io_pos * 8));
host->io_word[1] |= buf[off++] << (host->io_pos * 8);
host->io_pos++;
length--;
}
return off;
}
static int jmb38x_ms_transfer_data(struct jmb38x_ms_host *host)
{
unsigned int length;
unsigned int off;
unsigned int t_size, p_cnt;
unsigned char *buf;
struct page *pg;
unsigned long flags = 0;
if (host->req->long_data) {
length = host->req->sg.length - host->block_pos;
off = host->req->sg.offset + host->block_pos;
} else {
length = host->req->data_len - host->block_pos;
off = 0;
}
while (length) {
unsigned int p_off;
if (host->req->long_data) {
pg = nth_page(sg_page(&host->req->sg),
off >> PAGE_SHIFT);
p_off = offset_in_page(off);
p_cnt = PAGE_SIZE - p_off;
p_cnt = min(p_cnt, length);
local_irq_save(flags);
buf = kmap_atomic(pg) + p_off;
} else {
buf = host->req->data + host->block_pos;
p_cnt = host->req->data_len - host->block_pos;
}
if (host->req->data_dir == WRITE)
t_size = !(host->cmd_flags & REG_DATA)
? jmb38x_ms_write_data(host, buf, p_cnt)
: jmb38x_ms_write_reg_data(host, buf, p_cnt);
else
t_size = !(host->cmd_flags & REG_DATA)
? jmb38x_ms_read_data(host, buf, p_cnt)
: jmb38x_ms_read_reg_data(host, buf, p_cnt);
if (host->req->long_data) {
kunmap_atomic(buf - p_off);
local_irq_restore(flags);
}
if (!t_size)
break;
host->block_pos += t_size;
length -= t_size;
off += t_size;
}
if (!length && host->req->data_dir == WRITE) {
if (host->cmd_flags & REG_DATA) {
writel(host->io_word[0], host->addr + TPC_P0);
writel(host->io_word[1], host->addr + TPC_P1);
} else if (host->io_pos) {
writel(host->io_word[0], host->addr + DATA);
}
}
return length;
}
static int jmb38x_ms_issue_cmd(struct memstick_host *msh)
{
struct jmb38x_ms_host *host = memstick_priv(msh);
unsigned int data_len, cmd, t_val;
if (!(STATUS_HAS_MEDIA & readl(host->addr + STATUS))) {
dev_dbg(&msh->dev, "no media status\n");
host->req->error = -ETIME;
return host->req->error;
}
dev_dbg(&msh->dev, "control %08x\n", readl(host->addr + HOST_CONTROL));
dev_dbg(&msh->dev, "status %08x\n", readl(host->addr + INT_STATUS));
dev_dbg(&msh->dev, "hstatus %08x\n", readl(host->addr + STATUS));
host->cmd_flags = 0;
host->block_pos = 0;
host->io_pos = 0;
host->io_word[0] = 0;
host->io_word[1] = 0;
cmd = host->req->tpc << 16;
cmd |= TPC_DATA_SEL;
if (host->req->data_dir == READ)
cmd |= TPC_DIR;
if (host->req->need_card_int) {
if (host->ifmode == MEMSTICK_SERIAL)
cmd |= TPC_GET_INT;
else
cmd |= TPC_WAIT_INT;
}
if (!no_dma)
host->cmd_flags |= DMA_DATA;
if (host->req->long_data) {
data_len = host->req->sg.length;
} else {
data_len = host->req->data_len;
host->cmd_flags &= ~DMA_DATA;
}
if (data_len <= 8) {
cmd &= ~(TPC_DATA_SEL | 0xf);
host->cmd_flags |= REG_DATA;
cmd |= data_len & 0xf;
host->cmd_flags &= ~DMA_DATA;
}
if (host->cmd_flags & DMA_DATA) {
if (1 != dma_map_sg(&host->chip->pdev->dev, &host->req->sg, 1,
host->req->data_dir == READ
? DMA_FROM_DEVICE
: DMA_TO_DEVICE)) {
host->req->error = -ENOMEM;
return host->req->error;
}
data_len = sg_dma_len(&host->req->sg);
writel(sg_dma_address(&host->req->sg),
host->addr + DMA_ADDRESS);
writel(((1 << 16) & BLOCK_COUNT_MASK)
| (data_len & BLOCK_SIZE_MASK),
host->addr + BLOCK);
writel(DMA_CONTROL_ENABLE, host->addr + DMA_CONTROL);
} else if (!(host->cmd_flags & REG_DATA)) {
writel(((1 << 16) & BLOCK_COUNT_MASK)
| (data_len & BLOCK_SIZE_MASK),
host->addr + BLOCK);
t_val = readl(host->addr + INT_STATUS_ENABLE);
t_val |= host->req->data_dir == READ
? INT_STATUS_FIFO_RRDY
: INT_STATUS_FIFO_WRDY;
writel(t_val, host->addr + INT_STATUS_ENABLE);
writel(t_val, host->addr + INT_SIGNAL_ENABLE);
} else {
cmd &= ~(TPC_DATA_SEL | 0xf);
host->cmd_flags |= REG_DATA;
cmd |= data_len & 0xf;
if (host->req->data_dir == WRITE) {
jmb38x_ms_transfer_data(host);
writel(host->io_word[0], host->addr + TPC_P0);
writel(host->io_word[1], host->addr + TPC_P1);
}
}
mod_timer(&host->timer, jiffies + host->timeout_jiffies);
writel(HOST_CONTROL_LED | readl(host->addr + HOST_CONTROL),
host->addr + HOST_CONTROL);
host->req->error = 0;
writel(cmd, host->addr + TPC);
dev_dbg(&msh->dev, "executing TPC %08x, len %x\n", cmd, data_len);
return 0;
}
static void jmb38x_ms_complete_cmd(struct memstick_host *msh, int last)
{
struct jmb38x_ms_host *host = memstick_priv(msh);
unsigned int t_val = 0;
int rc;
del_timer(&host->timer);
dev_dbg(&msh->dev, "c control %08x\n",
readl(host->addr + HOST_CONTROL));
dev_dbg(&msh->dev, "c status %08x\n",
readl(host->addr + INT_STATUS));
dev_dbg(&msh->dev, "c hstatus %08x\n", readl(host->addr + STATUS));
host->req->int_reg = readl(host->addr + STATUS) & 0xff;
writel(0, host->addr + BLOCK);
writel(0, host->addr + DMA_CONTROL);
if (host->cmd_flags & DMA_DATA) {
dma_unmap_sg(&host->chip->pdev->dev, &host->req->sg, 1,
host->req->data_dir == READ
? DMA_FROM_DEVICE : DMA_TO_DEVICE);
} else {
t_val = readl(host->addr + INT_STATUS_ENABLE);
if (host->req->data_dir == READ)
t_val &= ~INT_STATUS_FIFO_RRDY;
else
t_val &= ~INT_STATUS_FIFO_WRDY;
writel(t_val, host->addr + INT_STATUS_ENABLE);
writel(t_val, host->addr + INT_SIGNAL_ENABLE);
}
writel((~HOST_CONTROL_LED) & readl(host->addr + HOST_CONTROL),
host->addr + HOST_CONTROL);
if (!last) {
do {
rc = memstick_next_req(msh, &host->req);
} while (!rc && jmb38x_ms_issue_cmd(msh));
} else {
do {
rc = memstick_next_req(msh, &host->req);
if (!rc)
host->req->error = -ETIME;
} while (!rc);
}
}
static irqreturn_t jmb38x_ms_isr(int irq, void *dev_id)
{
struct memstick_host *msh = dev_id;
struct jmb38x_ms_host *host = memstick_priv(msh);
unsigned int irq_status;
spin_lock(&host->lock);
irq_status = readl(host->addr + INT_STATUS);
dev_dbg(&host->chip->pdev->dev, "irq_status = %08x\n", irq_status);
if (irq_status == 0 || irq_status == (~0)) {
spin_unlock(&host->lock);
return IRQ_NONE;
}
if (host->req) {
if (irq_status & INT_STATUS_ANY_ERR) {
if (irq_status & INT_STATUS_CRC_ERR)
host->req->error = -EILSEQ;
else if (irq_status & INT_STATUS_TPC_ERR) {
dev_dbg(&host->chip->pdev->dev, "TPC_ERR\n");
jmb38x_ms_complete_cmd(msh, 0);
} else
host->req->error = -ETIME;
} else {
if (host->cmd_flags & DMA_DATA) {
if (irq_status & INT_STATUS_EOTRAN)
host->cmd_flags |= FIFO_READY;
} else {
if (irq_status & (INT_STATUS_FIFO_RRDY
| INT_STATUS_FIFO_WRDY))
jmb38x_ms_transfer_data(host);
if (irq_status & INT_STATUS_EOTRAN) {
jmb38x_ms_transfer_data(host);
host->cmd_flags |= FIFO_READY;
}
}
if (irq_status & INT_STATUS_EOTPC) {
host->cmd_flags |= CMD_READY;
if (host->cmd_flags & REG_DATA) {
if (host->req->data_dir == READ) {
host->io_word[0]
= readl(host->addr
+ TPC_P0);
host->io_word[1]
= readl(host->addr
+ TPC_P1);
host->io_pos = 8;
jmb38x_ms_transfer_data(host);
}
host->cmd_flags |= FIFO_READY;
}
}
}
}
if (irq_status & (INT_STATUS_MEDIA_IN | INT_STATUS_MEDIA_OUT)) {
dev_dbg(&host->chip->pdev->dev, "media changed\n");
memstick_detect_change(msh);
}
writel(irq_status, host->addr + INT_STATUS);
if (host->req
&& (((host->cmd_flags & CMD_READY)
&& (host->cmd_flags & FIFO_READY))
|| host->req->error))
jmb38x_ms_complete_cmd(msh, 0);
spin_unlock(&host->lock);
return IRQ_HANDLED;
}
static void jmb38x_ms_abort(struct timer_list *t)
{
struct jmb38x_ms_host *host = from_timer(host, t, timer);
struct memstick_host *msh = host->msh;
unsigned long flags;
dev_dbg(&host->chip->pdev->dev, "abort\n");
spin_lock_irqsave(&host->lock, flags);
if (host->req) {
host->req->error = -ETIME;
jmb38x_ms_complete_cmd(msh, 0);
}
spin_unlock_irqrestore(&host->lock, flags);
}
static void jmb38x_ms_req_tasklet(unsigned long data)
{
struct memstick_host *msh = (struct memstick_host *)data;
struct jmb38x_ms_host *host = memstick_priv(msh);
unsigned long flags;
int rc;
spin_lock_irqsave(&host->lock, flags);
if (!host->req) {
do {
rc = memstick_next_req(msh, &host->req);
dev_dbg(&host->chip->pdev->dev, "tasklet req %d\n", rc);
} while (!rc && jmb38x_ms_issue_cmd(msh));
}
spin_unlock_irqrestore(&host->lock, flags);
}
static void jmb38x_ms_dummy_submit(struct memstick_host *msh)
{
return;
}
static void jmb38x_ms_submit_req(struct memstick_host *msh)
{
struct jmb38x_ms_host *host = memstick_priv(msh);
tasklet_schedule(&host->notify);
}
static int jmb38x_ms_reset(struct jmb38x_ms_host *host)
{
int cnt;
writel(HOST_CONTROL_RESET_REQ | HOST_CONTROL_CLOCK_EN
| readl(host->addr + HOST_CONTROL),
host->addr + HOST_CONTROL);
for (cnt = 0; cnt < 20; ++cnt) {
if (!(HOST_CONTROL_RESET_REQ
& readl(host->addr + HOST_CONTROL)))
goto reset_next;
ndelay(20);
}
dev_dbg(&host->chip->pdev->dev, "reset_req timeout\n");
reset_next:
writel(HOST_CONTROL_RESET | HOST_CONTROL_CLOCK_EN
| readl(host->addr + HOST_CONTROL),
host->addr + HOST_CONTROL);
for (cnt = 0; cnt < 20; ++cnt) {
if (!(HOST_CONTROL_RESET
& readl(host->addr + HOST_CONTROL)))
goto reset_ok;
ndelay(20);
}
dev_dbg(&host->chip->pdev->dev, "reset timeout\n");
return -EIO;
reset_ok:
writel(INT_STATUS_ALL, host->addr + INT_SIGNAL_ENABLE);
writel(INT_STATUS_ALL, host->addr + INT_STATUS_ENABLE);
return 0;
}
static int jmb38x_ms_set_param(struct memstick_host *msh,
enum memstick_param param,
int value)
{
struct jmb38x_ms_host *host = memstick_priv(msh);
unsigned int host_ctl = readl(host->addr + HOST_CONTROL);
unsigned int clock_ctl = CLOCK_CONTROL_BY_MMIO, clock_delay = 0;
int rc = 0;
switch (param) {
case MEMSTICK_POWER:
if (value == MEMSTICK_POWER_ON) {
rc = jmb38x_ms_reset(host);
if (rc)
return rc;
host_ctl = 7;
host_ctl |= HOST_CONTROL_POWER_EN
| HOST_CONTROL_CLOCK_EN;
writel(host_ctl, host->addr + HOST_CONTROL);
writel(host->id ? PAD_PU_PD_ON_MS_SOCK1
: PAD_PU_PD_ON_MS_SOCK0,
host->addr + PAD_PU_PD);
writel(PAD_OUTPUT_ENABLE_MS,
host->addr + PAD_OUTPUT_ENABLE);
msleep(10);
dev_dbg(&host->chip->pdev->dev, "power on\n");
} else if (value == MEMSTICK_POWER_OFF) {
host_ctl &= ~(HOST_CONTROL_POWER_EN
| HOST_CONTROL_CLOCK_EN);
writel(host_ctl, host->addr + HOST_CONTROL);
writel(0, host->addr + PAD_OUTPUT_ENABLE);
writel(PAD_PU_PD_OFF, host->addr + PAD_PU_PD);
dev_dbg(&host->chip->pdev->dev, "power off\n");
} else
return -EINVAL;
break;
case MEMSTICK_INTERFACE:
dev_dbg(&host->chip->pdev->dev,
"Set Host Interface Mode to %d\n", value);
host_ctl &= ~(HOST_CONTROL_FAST_CLK | HOST_CONTROL_REI |
HOST_CONTROL_REO);
host_ctl |= HOST_CONTROL_TDELAY_EN | HOST_CONTROL_HW_OC_P;
host_ctl &= ~(3 << HOST_CONTROL_IF_SHIFT);
if (value == MEMSTICK_SERIAL) {
host_ctl |= HOST_CONTROL_IF_SERIAL
<< HOST_CONTROL_IF_SHIFT;
host_ctl |= HOST_CONTROL_REI;
clock_ctl |= CLOCK_CONTROL_40MHZ;
clock_delay = 0;
} else if (value == MEMSTICK_PAR4) {
host_ctl |= HOST_CONTROL_FAST_CLK;
host_ctl |= HOST_CONTROL_IF_PAR4
<< HOST_CONTROL_IF_SHIFT;
host_ctl |= HOST_CONTROL_REO;
clock_ctl |= CLOCK_CONTROL_40MHZ;
clock_delay = 4;
} else if (value == MEMSTICK_PAR8) {
host_ctl |= HOST_CONTROL_FAST_CLK;
host_ctl |= HOST_CONTROL_IF_PAR8
<< HOST_CONTROL_IF_SHIFT;
clock_ctl |= CLOCK_CONTROL_50MHZ;
clock_delay = 0;
} else
return -EINVAL;
writel(host_ctl, host->addr + HOST_CONTROL);
writel(CLOCK_CONTROL_OFF, host->addr + CLOCK_CONTROL);
writel(clock_ctl, host->addr + CLOCK_CONTROL);
pci_write_config_byte(host->chip->pdev,
PCI_CTL_CLOCK_DLY_ADDR + 1,
clock_delay);
host->ifmode = value;
break;
}
return 0;
}
#define PCI_PMOS0_CONTROL 0xae
#define PMOS0_ENABLE 0x01
#define PMOS0_OVERCURRENT_LEVEL_2_4V 0x06
#define PMOS0_EN_OVERCURRENT_DEBOUNCE 0x40
#define PMOS0_SW_LED_POLARITY_ENABLE 0x80
#define PMOS0_ACTIVE_BITS (PMOS0_ENABLE | PMOS0_EN_OVERCURRENT_DEBOUNCE | \
PMOS0_OVERCURRENT_LEVEL_2_4V)
#define PCI_PMOS1_CONTROL 0xbd
#define PMOS1_ACTIVE_BITS 0x4a
#define PCI_CLOCK_CTL 0xb9
static int jmb38x_ms_pmos(struct pci_dev *pdev, int flag)
{
unsigned char val;
pci_read_config_byte(pdev, PCI_PMOS0_CONTROL, &val);
if (flag)
val |= PMOS0_ACTIVE_BITS;
else
val &= ~PMOS0_ACTIVE_BITS;
pci_write_config_byte(pdev, PCI_PMOS0_CONTROL, val);
dev_dbg(&pdev->dev, "JMB38x: set PMOS0 val 0x%x\n", val);
if (pci_resource_flags(pdev, 1)) {
pci_read_config_byte(pdev, PCI_PMOS1_CONTROL, &val);
if (flag)
val |= PMOS1_ACTIVE_BITS;
else
val &= ~PMOS1_ACTIVE_BITS;
pci_write_config_byte(pdev, PCI_PMOS1_CONTROL, val);
dev_dbg(&pdev->dev, "JMB38x: set PMOS1 val 0x%x\n", val);
}
pci_read_config_byte(pdev, PCI_CLOCK_CTL, &val);
pci_write_config_byte(pdev, PCI_CLOCK_CTL, val & ~0x0f);
pci_write_config_byte(pdev, PCI_CLOCK_CTL, val | 0x01);
dev_dbg(&pdev->dev, "Clock Control by PCI config is disabled!\n");
return 0;
}
static int __maybe_unused jmb38x_ms_suspend(struct device *dev)
{
struct jmb38x_ms *jm = dev_get_drvdata(dev);
int cnt;
for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
if (!jm->hosts[cnt])
break;
memstick_suspend_host(jm->hosts[cnt]);
}
device_wakeup_disable(dev);
return 0;
}
static int __maybe_unused jmb38x_ms_resume(struct device *dev)
{
struct jmb38x_ms *jm = dev_get_drvdata(dev);
int rc;
jmb38x_ms_pmos(to_pci_dev(dev), 1);
for (rc = 0; rc < jm->host_cnt; ++rc) {
if (!jm->hosts[rc])
break;
memstick_resume_host(jm->hosts[rc]);
memstick_detect_change(jm->hosts[rc]);
}
return 0;
}
static int jmb38x_ms_count_slots(struct pci_dev *pdev)
{
int cnt, rc = 0;
for (cnt = 0; cnt < PCI_STD_NUM_BARS; ++cnt) {
if (!(IORESOURCE_MEM & pci_resource_flags(pdev, cnt)))
break;
if (256 != pci_resource_len(pdev, cnt))
break;
++rc;
}
return rc;
}
static struct memstick_host *jmb38x_ms_alloc_host(struct jmb38x_ms *jm, int cnt)
{
struct memstick_host *msh;
struct jmb38x_ms_host *host;
msh = memstick_alloc_host(sizeof(struct jmb38x_ms_host),
&jm->pdev->dev);
if (!msh)
return NULL;
host = memstick_priv(msh);
host->msh = msh;
host->chip = jm;
host->addr = ioremap(pci_resource_start(jm->pdev, cnt),
pci_resource_len(jm->pdev, cnt));
if (!host->addr)
goto err_out_free;
spin_lock_init(&host->lock);
host->id = cnt;
snprintf(host->host_id, sizeof(host->host_id), DRIVER_NAME ":slot%d",
host->id);
host->irq = jm->pdev->irq;
host->timeout_jiffies = msecs_to_jiffies(1000);
tasklet_init(&host->notify, jmb38x_ms_req_tasklet, (unsigned long)msh);
msh->request = jmb38x_ms_submit_req;
msh->set_param = jmb38x_ms_set_param;
msh->caps = MEMSTICK_CAP_PAR4 | MEMSTICK_CAP_PAR8;
timer_setup(&host->timer, jmb38x_ms_abort, 0);
if (!request_irq(host->irq, jmb38x_ms_isr, IRQF_SHARED, host->host_id,
msh))
return msh;
iounmap(host->addr);
err_out_free:
memstick_free_host(msh);
return NULL;
}
static void jmb38x_ms_free_host(struct memstick_host *msh)
{
struct jmb38x_ms_host *host = memstick_priv(msh);
free_irq(host->irq, msh);
iounmap(host->addr);
memstick_free_host(msh);
}
static int jmb38x_ms_probe(struct pci_dev *pdev,
const struct pci_device_id *dev_id)
{
struct jmb38x_ms *jm;
int pci_dev_busy = 0;
int rc, cnt;
rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
if (rc)
return rc;
rc = pci_enable_device(pdev);
if (rc)
return rc;
pci_set_master(pdev);
rc = pci_request_regions(pdev, DRIVER_NAME);
if (rc) {
pci_dev_busy = 1;
goto err_out;
}
jmb38x_ms_pmos(pdev, 1);
cnt = jmb38x_ms_count_slots(pdev);
if (!cnt) {
rc = -ENODEV;
pci_dev_busy = 1;
goto err_out_int;
}
jm = kzalloc(struct_size(jm, hosts, cnt), GFP_KERNEL);
if (!jm) {
rc = -ENOMEM;
goto err_out_int;
}
jm->pdev = pdev;
jm->host_cnt = cnt;
pci_set_drvdata(pdev, jm);
for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
jm->hosts[cnt] = jmb38x_ms_alloc_host(jm, cnt);
if (!jm->hosts[cnt])
break;
rc = memstick_add_host(jm->hosts[cnt]);
if (rc) {
jmb38x_ms_free_host(jm->hosts[cnt]);
jm->hosts[cnt] = NULL;
break;
}
}
if (cnt)
return 0;
rc = -ENODEV;
pci_set_drvdata(pdev, NULL);
kfree(jm);
err_out_int:
pci_release_regions(pdev);
err_out:
if (!pci_dev_busy)
pci_disable_device(pdev);
return rc;
}
static void jmb38x_ms_remove(struct pci_dev *dev)
{
struct jmb38x_ms *jm = pci_get_drvdata(dev);
struct jmb38x_ms_host *host;
int cnt;
unsigned long flags;
for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
if (!jm->hosts[cnt])
break;
host = memstick_priv(jm->hosts[cnt]);
jm->hosts[cnt]->request = jmb38x_ms_dummy_submit;
tasklet_kill(&host->notify);
writel(0, host->addr + INT_SIGNAL_ENABLE);
writel(0, host->addr + INT_STATUS_ENABLE);
dev_dbg(&jm->pdev->dev, "interrupts off\n");
spin_lock_irqsave(&host->lock, flags);
if (host->req) {
host->req->error = -ETIME;
jmb38x_ms_complete_cmd(jm->hosts[cnt], 1);
}
spin_unlock_irqrestore(&host->lock, flags);
memstick_remove_host(jm->hosts[cnt]);
dev_dbg(&jm->pdev->dev, "host removed\n");
jmb38x_ms_free_host(jm->hosts[cnt]);
}
jmb38x_ms_pmos(dev, 0);
pci_set_drvdata(dev, NULL);
pci_release_regions(dev);
pci_disable_device(dev);
kfree(jm);
}
static struct pci_device_id jmb38x_ms_id_tbl [] = {
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB38X_MS) },
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB385_MS) },
{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB390_MS) },
{ }
};
static SIMPLE_DEV_PM_OPS(jmb38x_ms_pm_ops, jmb38x_ms_suspend, jmb38x_ms_resume);
static struct pci_driver jmb38x_ms_driver = {
.name = DRIVER_NAME,
.id_table = jmb38x_ms_id_tbl,
.probe = jmb38x_ms_probe,
.remove = jmb38x_ms_remove,
.driver.pm = &jmb38x_ms_pm_ops,
};
module_pci_driver(jmb38x_ms_driver);
MODULE_AUTHOR("Alex Dubov");
MODULE_DESCRIPTION("JMicron jmb38x MemoryStick driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, jmb38x_ms_id_tbl);