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Date: Wed, 17 Nov 2010 22:08:28 +0800
From: Yong Wang <yong.y.wang@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...e.de>
Cc: chuanxiao.dong@...el.com, yunpeng.gao@...el.com,
linux-kernel@...r.kernel.org
Subject: [PATCH] staging: spectra: move all init logic into nand_pci_probe
Currently there are some driver initialization logic that
is not part of nand_pci_probe function. This will result in
that part of driver initialization code executing even on
platforms without the corresponding hardware which is always
dangerous.
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@...el.com>
Signed-off-by: Yong Wang <yong.y.wang@...el.com>
---
drivers/staging/spectra/ffsport.c | 56 ++++++-----
drivers/staging/spectra/ffsport.h | 1 +
drivers/staging/spectra/flash.c | 4 +-
drivers/staging/spectra/lld_nand.c | 177 +++++++++++++++++++-----------------
4 files changed, 127 insertions(+), 111 deletions(-)
diff --git a/drivers/staging/spectra/ffsport.c b/drivers/staging/spectra/ffsport.c
index 63a9d0a..ae101a2 100644
--- a/drivers/staging/spectra/ffsport.c
+++ b/drivers/staging/spectra/ffsport.c
@@ -729,34 +729,16 @@ static void create_sysfs_entry(struct device *dev)
}
*/
-static int GLOB_SBD_init(void)
+int register_spectra_ftl()
{
int i;
- /* Set debug output level (0~3) here. 3 is most verbose */
- printk(KERN_ALERT "Spectra: %s\n", GLOB_version);
-
- mutex_init(&spectra_lock);
-
- GLOB_SBD_majornum = register_blkdev(0, GLOB_SBD_NAME);
- if (GLOB_SBD_majornum <= 0) {
- printk(KERN_ERR "Unable to get the major %d for Spectra",
- GLOB_SBD_majornum);
- return -EBUSY;
- }
-
- if (PASS != GLOB_FTL_Flash_Init()) {
- printk(KERN_ERR "Spectra: Unable to Initialize Flash Device. "
- "Aborting\n");
- goto out_flash_register;
- }
-
/* create_sysfs_entry(&dev->dev); */
if (PASS != GLOB_FTL_IdentifyDevice(&IdentifyDeviceData)) {
printk(KERN_ERR "Spectra: Unable to Read Flash Device. "
"Aborting\n");
- goto out_flash_register;
+ return -ENOMEM;
} else {
nand_dbg_print(NAND_DBG_WARN, "In GLOB_SBD_init: "
"Num blocks=%d, pagesperblock=%d, "
@@ -775,24 +757,46 @@ static int GLOB_SBD_init(void)
}
printk(KERN_ALERT "Spectra: block table has been found.\n");
+ GLOB_SBD_majornum = register_blkdev(0, GLOB_SBD_NAME);
+ if (GLOB_SBD_majornum <= 0) {
+ printk(KERN_ERR "Unable to get the major %d for Spectra",
+ GLOB_SBD_majornum);
+ goto out_ftl_flash_register;
+ }
+
for (i = 0; i < NUM_DEVICES; i++)
if (SBD_setup_device(&nand_device[i], i) == -ENOMEM)
- goto out_ftl_flash_register;
+ goto out_blk_register;
nand_dbg_print(NAND_DBG_DEBUG,
"Spectra: module loaded with major number %d\n",
GLOB_SBD_majornum);
- return 0;
+ return PASS;
+out_blk_register:
+ unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME);
out_ftl_flash_register:
GLOB_FTL_Cache_Release();
-out_flash_register:
- GLOB_FTL_Flash_Release();
- unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME);
printk(KERN_ERR "Spectra: Module load failed.\n");
- return -ENOMEM;
+ return FAIL;
+}
+EXPORT_SYMBOL_GPL(register_spectra_ftl);
+
+static int GLOB_SBD_init(void)
+{
+ /* Set debug output level (0~3) here. 3 is most verbose */
+ printk(KERN_ALERT "Spectra: %s\n", GLOB_version);
+
+ mutex_init(&spectra_lock);
+
+ if (PASS != GLOB_FTL_Flash_Init()) {
+ printk(KERN_ERR "Spectra: Unable to Initialize Flash Device. "
+ "Aborting\n");
+ return -ENODEV;
+ }
+ return 0;
}
static void __exit GLOB_SBD_exit(void)
diff --git a/drivers/staging/spectra/ffsport.h b/drivers/staging/spectra/ffsport.h
index 6c5d90c..85c0750 100644
--- a/drivers/staging/spectra/ffsport.h
+++ b/drivers/staging/spectra/ffsport.h
@@ -80,5 +80,6 @@ extern int nand_debug_level;
extern int GLOB_Calc_Used_Bits(u32 n);
extern u64 GLOB_u64_Div(u64 addr, u32 divisor);
extern u64 GLOB_u64_Remainder(u64 addr, u32 divisor_type);
+extern int register_spectra_ftl(void);
#endif /* _FFSPORT_ */
diff --git a/drivers/staging/spectra/flash.c b/drivers/staging/spectra/flash.c
index 4e6e451..fb39c8e 100644
--- a/drivers/staging/spectra/flash.c
+++ b/drivers/staging/spectra/flash.c
@@ -1258,9 +1258,7 @@ int GLOB_FTL_Flash_Init(void)
g_SBDCmdIndex = 0;
- GLOB_LLD_Flash_Init();
-
- status = GLOB_LLD_Read_Device_ID();
+ status = GLOB_LLD_Flash_Init();
return status;
}
diff --git a/drivers/staging/spectra/lld_nand.c b/drivers/staging/spectra/lld_nand.c
index 0d647a8..2263d3e 100644
--- a/drivers/staging/spectra/lld_nand.c
+++ b/drivers/staging/spectra/lld_nand.c
@@ -2395,14 +2395,94 @@ static int nand_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
unsigned long csr_base;
unsigned long csr_len;
struct mrst_nand_info *pndev = &info;
+ u32 int_mask;
nand_dbg_print(NAND_DBG_WARN, "%s, Line %d, Function: %s\n",
__FILE__, __LINE__, __func__);
+ FlashReg = ioremap_nocache(GLOB_HWCTL_REG_BASE,
+ GLOB_HWCTL_REG_SIZE);
+ if (!FlashReg) {
+ printk(KERN_ERR "Spectra: ioremap_nocache failed!");
+ return -ENOMEM;
+ }
+ nand_dbg_print(NAND_DBG_WARN,
+ "Spectra: Remapped reg base address: "
+ "0x%p, len: %d\n",
+ FlashReg, GLOB_HWCTL_REG_SIZE);
+
+ FlashMem = ioremap_nocache(GLOB_HWCTL_MEM_BASE,
+ GLOB_HWCTL_MEM_SIZE);
+ if (!FlashMem) {
+ printk(KERN_ERR "Spectra: ioremap_nocache failed!");
+ iounmap(FlashReg);
+ return -ENOMEM;
+ }
+ nand_dbg_print(NAND_DBG_WARN,
+ "Spectra: Remapped flash base address: "
+ "0x%p, len: %d\n",
+ (void *)FlashMem, GLOB_HWCTL_MEM_SIZE);
+
+ nand_dbg_print(NAND_DBG_DEBUG, "Dump timing register values:"
+ "acc_clks: %d, re_2_we: %d, we_2_re: %d,"
+ "addr_2_data: %d, rdwr_en_lo_cnt: %d, "
+ "rdwr_en_hi_cnt: %d, cs_setup_cnt: %d\n",
+ ioread32(FlashReg + ACC_CLKS),
+ ioread32(FlashReg + RE_2_WE),
+ ioread32(FlashReg + WE_2_RE),
+ ioread32(FlashReg + ADDR_2_DATA),
+ ioread32(FlashReg + RDWR_EN_LO_CNT),
+ ioread32(FlashReg + RDWR_EN_HI_CNT),
+ ioread32(FlashReg + CS_SETUP_CNT));
+
+ NAND_Flash_Reset();
+
+ iowrite32(0, FlashReg + GLOBAL_INT_ENABLE);
+
+#if CMD_DMA
+ info.pcmds_num = 0;
+ info.flash_bank = 0;
+ info.cdma_num = 0;
+ int_mask = (DMA_INTR__DESC_COMP_CHANNEL0 |
+ DMA_INTR__DESC_COMP_CHANNEL1 |
+ DMA_INTR__DESC_COMP_CHANNEL2 |
+ DMA_INTR__DESC_COMP_CHANNEL3 |
+ DMA_INTR__MEMCOPY_DESC_COMP);
+ iowrite32(int_mask, FlashReg + DMA_INTR_EN);
+ iowrite32(0xFFFF, FlashReg + DMA_INTR);
+
+ int_mask = (INTR_STATUS0__ECC_ERR |
+ INTR_STATUS0__PROGRAM_FAIL |
+ INTR_STATUS0__ERASE_FAIL);
+#else
+ int_mask = INTR_STATUS0__DMA_CMD_COMP |
+ INTR_STATUS0__ECC_TRANSACTION_DONE |
+ INTR_STATUS0__ECC_ERR |
+ INTR_STATUS0__PROGRAM_FAIL |
+ INTR_STATUS0__ERASE_FAIL;
+#endif
+ iowrite32(int_mask, FlashReg + INTR_EN0);
+ iowrite32(int_mask, FlashReg + INTR_EN1);
+ iowrite32(int_mask, FlashReg + INTR_EN2);
+ iowrite32(int_mask, FlashReg + INTR_EN3);
+
+ /* Clear all status bits */
+ iowrite32(0xFFFF, FlashReg + INTR_STATUS0);
+ iowrite32(0xFFFF, FlashReg + INTR_STATUS1);
+ iowrite32(0xFFFF, FlashReg + INTR_STATUS2);
+ iowrite32(0xFFFF, FlashReg + INTR_STATUS3);
+
+ iowrite32(0x0F, FlashReg + RB_PIN_ENABLED);
+ iowrite32(CHIP_EN_DONT_CARE__FLAG, FlashReg + CHIP_ENABLE_DONT_CARE);
+
+ /* Should set value for these registers when init */
+ iowrite32(0, FlashReg + TWO_ROW_ADDR_CYCLES);
+ iowrite32(1, FlashReg + ECC_ENABLE);
+ enable_ecc = 1;
ret = pci_enable_device(dev);
if (ret) {
printk(KERN_ERR "Spectra: pci_enable_device failed.\n");
- return ret;
+ goto failed_req_csr;
}
pci_set_master(dev);
@@ -2461,12 +2541,26 @@ static int nand_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
pci_set_drvdata(dev, pndev);
+ ret = GLOB_LLD_Read_Device_ID();
+ if (ret) {
+ iounmap(pndev->ioaddr);
+ goto failed_remap_csr;
+ }
+
+ ret = register_spectra_ftl();
+ if (ret) {
+ iounmap(pndev->ioaddr);
+ goto failed_remap_csr;
+ }
+
return 0;
failed_remap_csr:
pci_release_regions(dev);
failed_req_csr:
pci_disable_device(dev);
+ iounmap(FlashMem);
+ iounmap(FlashReg);
return ret;
}
@@ -2498,91 +2592,10 @@ static struct pci_driver nand_pci_driver = {
int NAND_Flash_Init(void)
{
int retval;
- u32 int_mask;
nand_dbg_print(NAND_DBG_TRACE, "%s, Line %d, Function: %s\n",
__FILE__, __LINE__, __func__);
- FlashReg = ioremap_nocache(GLOB_HWCTL_REG_BASE,
- GLOB_HWCTL_REG_SIZE);
- if (!FlashReg) {
- printk(KERN_ERR "Spectra: ioremap_nocache failed!");
- return -ENOMEM;
- }
- nand_dbg_print(NAND_DBG_WARN,
- "Spectra: Remapped reg base address: "
- "0x%p, len: %d\n",
- FlashReg, GLOB_HWCTL_REG_SIZE);
-
- FlashMem = ioremap_nocache(GLOB_HWCTL_MEM_BASE,
- GLOB_HWCTL_MEM_SIZE);
- if (!FlashMem) {
- printk(KERN_ERR "Spectra: ioremap_nocache failed!");
- iounmap(FlashReg);
- return -ENOMEM;
- }
- nand_dbg_print(NAND_DBG_WARN,
- "Spectra: Remapped flash base address: "
- "0x%p, len: %d\n",
- (void *)FlashMem, GLOB_HWCTL_MEM_SIZE);
-
- nand_dbg_print(NAND_DBG_DEBUG, "Dump timing register values:"
- "acc_clks: %d, re_2_we: %d, we_2_re: %d,"
- "addr_2_data: %d, rdwr_en_lo_cnt: %d, "
- "rdwr_en_hi_cnt: %d, cs_setup_cnt: %d\n",
- ioread32(FlashReg + ACC_CLKS),
- ioread32(FlashReg + RE_2_WE),
- ioread32(FlashReg + WE_2_RE),
- ioread32(FlashReg + ADDR_2_DATA),
- ioread32(FlashReg + RDWR_EN_LO_CNT),
- ioread32(FlashReg + RDWR_EN_HI_CNT),
- ioread32(FlashReg + CS_SETUP_CNT));
-
- NAND_Flash_Reset();
-
- iowrite32(0, FlashReg + GLOBAL_INT_ENABLE);
-
-#if CMD_DMA
- info.pcmds_num = 0;
- info.flash_bank = 0;
- info.cdma_num = 0;
- int_mask = (DMA_INTR__DESC_COMP_CHANNEL0 |
- DMA_INTR__DESC_COMP_CHANNEL1 |
- DMA_INTR__DESC_COMP_CHANNEL2 |
- DMA_INTR__DESC_COMP_CHANNEL3 |
- DMA_INTR__MEMCOPY_DESC_COMP);
- iowrite32(int_mask, FlashReg + DMA_INTR_EN);
- iowrite32(0xFFFF, FlashReg + DMA_INTR);
-
- int_mask = (INTR_STATUS0__ECC_ERR |
- INTR_STATUS0__PROGRAM_FAIL |
- INTR_STATUS0__ERASE_FAIL);
-#else
- int_mask = INTR_STATUS0__DMA_CMD_COMP |
- INTR_STATUS0__ECC_TRANSACTION_DONE |
- INTR_STATUS0__ECC_ERR |
- INTR_STATUS0__PROGRAM_FAIL |
- INTR_STATUS0__ERASE_FAIL;
-#endif
- iowrite32(int_mask, FlashReg + INTR_EN0);
- iowrite32(int_mask, FlashReg + INTR_EN1);
- iowrite32(int_mask, FlashReg + INTR_EN2);
- iowrite32(int_mask, FlashReg + INTR_EN3);
-
- /* Clear all status bits */
- iowrite32(0xFFFF, FlashReg + INTR_STATUS0);
- iowrite32(0xFFFF, FlashReg + INTR_STATUS1);
- iowrite32(0xFFFF, FlashReg + INTR_STATUS2);
- iowrite32(0xFFFF, FlashReg + INTR_STATUS3);
-
- iowrite32(0x0F, FlashReg + RB_PIN_ENABLED);
- iowrite32(CHIP_EN_DONT_CARE__FLAG, FlashReg + CHIP_ENABLE_DONT_CARE);
-
- /* Should set value for these registers when init */
- iowrite32(0, FlashReg + TWO_ROW_ADDR_CYCLES);
- iowrite32(1, FlashReg + ECC_ENABLE);
- enable_ecc = 1;
-
retval = pci_register_driver(&nand_pci_driver);
if (retval)
return -ENOMEM;
--
1.5.5.1
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