[PATCH 02/10] drivers/mfd/sta2x11-mfd: add regmap support
From: ciminaghi
Date: Mon Oct 22 2012 - 10:51:15 EST
From: Davide Ciminaghi <ciminaghi@xxxxxxxxx>
Signed-off-by: Davide Ciminaghi <ciminaghi@xxxxxxxxx>
---
drivers/mfd/Kconfig | 1 +
drivers/mfd/sta2x11-mfd.c | 231 +++++++++++++++++++++------------------
include/linux/mfd/sta2x11-mfd.h | 1 +
3 files changed, 128 insertions(+), 105 deletions(-)
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index acab3ef..b28a917 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1025,6 +1025,7 @@ config MFD_STA2X11
bool "STA2X11 multi function device support"
depends on STA2X11
select MFD_CORE
+ select REGMAP_MMIO
config MFD_SYSCON
bool "System Controller Register R/W Based on Regmap"
diff --git a/drivers/mfd/sta2x11-mfd.c b/drivers/mfd/sta2x11-mfd.c
index 9e01b84..2fc5a96 100644
--- a/drivers/mfd/sta2x11-mfd.c
+++ b/drivers/mfd/sta2x11-mfd.c
@@ -27,17 +27,25 @@
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/pci.h>
-#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/sta2x11-mfd.h>
+#include <linux/regmap.h>
#include <asm/sta2x11.h>
+static inline int __reg_within_range(unsigned int r,
+ unsigned int start,
+ unsigned int end)
+{
+ return ((r >= start) && (r <= end));
+}
+
/* This describes STA2X11 MFD chip for us, we may have several */
struct sta2x11_mfd {
struct sta2x11_instance *instance;
+ struct regmap *regmap;
spinlock_t lock;
struct list_head list;
void __iomem *regs[sta2x11_n_mfd_plat_devs];
@@ -127,118 +135,123 @@ u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val,
}
EXPORT_SYMBOL(__sta2x11_mfd_mask);
-/* Two debugfs files, for our registers (FIXME: one instance only) */
-#define REG(regname) {.name = #regname, .offset = SCTL_ ## regname}
-static struct debugfs_reg32 sta2x11_sctl_regs[] = {
- REG(SCCTL), REG(ARMCFG), REG(SCPLLCTL), REG(SCPLLFCTRL),
- REG(SCRESFRACT), REG(SCRESCTRL1), REG(SCRESXTRL2), REG(SCPEREN0),
- REG(SCPEREN1), REG(SCPEREN2), REG(SCGRST), REG(SCPCIPMCR1),
- REG(SCPCIPMCR2), REG(SCPCIPMSR1), REG(SCPCIPMSR2), REG(SCPCIPMSR3),
- REG(SCINTREN), REG(SCRISR), REG(SCCLKSTAT0), REG(SCCLKSTAT1),
- REG(SCCLKSTAT2), REG(SCRSTSTA),
-};
-#undef REG
+/*
+ * Special sta2x11-mfd regmap lock/unlock functions
+ */
-static struct debugfs_regset32 sctl_regset = {
- .regs = sta2x11_sctl_regs,
- .nregs = ARRAY_SIZE(sta2x11_sctl_regs),
-};
+static void sta2x11_regmap_lock(void *__lock)
+{
+ spinlock_t *lock = __lock;
+ spin_lock(lock);
+}
-#define REG(regname) {.name = #regname, .offset = regname}
-static struct debugfs_reg32 sta2x11_apbreg_regs[] = {
- REG(APBREG_BSR), REG(APBREG_PAER), REG(APBREG_PWAC), REG(APBREG_PRAC),
- REG(APBREG_PCG), REG(APBREG_PUR), REG(APBREG_EMU_PCG),
-};
-#undef REG
+static void sta2x11_regmap_unlock(void *__lock)
+{
+ spinlock_t *lock = __lock;
+ spin_unlock(lock);
+}
-static struct debugfs_regset32 apbreg_regset = {
- .regs = sta2x11_apbreg_regs,
- .nregs = ARRAY_SIZE(sta2x11_apbreg_regs),
+static const char *sta2x11_mfd_names[sta2x11_n_mfd_plat_devs] = {
+ [sta2x11_sctl] = "sta2x11-sctl",
+ [sta2x11_apbreg] = "sta2x11-apbreg",
+ [sta2x11_apb_soc_regs] = "sta2x11-apb-soc-regs",
};
-#define REG(regname) {.name = #regname, .offset = regname}
-static struct debugfs_reg32 sta2x11_apb_soc_regs_regs[] = {
- REG(PCIE_EP1_FUNC3_0_INTR_REG), REG(PCIE_EP1_FUNC7_4_INTR_REG),
- REG(PCIE_EP2_FUNC3_0_INTR_REG), REG(PCIE_EP2_FUNC7_4_INTR_REG),
- REG(PCIE_EP3_FUNC3_0_INTR_REG), REG(PCIE_EP3_FUNC7_4_INTR_REG),
- REG(PCIE_EP4_FUNC3_0_INTR_REG), REG(PCIE_EP4_FUNC7_4_INTR_REG),
- REG(PCIE_INTR_ENABLE0_REG), REG(PCIE_INTR_ENABLE1_REG),
- REG(PCIE_EP1_FUNC_TC_REG), REG(PCIE_EP2_FUNC_TC_REG),
- REG(PCIE_EP3_FUNC_TC_REG), REG(PCIE_EP4_FUNC_TC_REG),
- REG(PCIE_EP1_FUNC_F_REG), REG(PCIE_EP2_FUNC_F_REG),
- REG(PCIE_EP3_FUNC_F_REG), REG(PCIE_EP4_FUNC_F_REG),
- REG(PCIE_PAB_AMBA_SW_RST_REG), REG(PCIE_PM_STATUS_0_PORT_0_4),
- REG(PCIE_PM_STATUS_7_0_EP1), REG(PCIE_PM_STATUS_7_0_EP2),
- REG(PCIE_PM_STATUS_7_0_EP3), REG(PCIE_PM_STATUS_7_0_EP4),
- REG(PCIE_DEV_ID_0_EP1_REG), REG(PCIE_CC_REV_ID_0_EP1_REG),
- REG(PCIE_DEV_ID_1_EP1_REG), REG(PCIE_CC_REV_ID_1_EP1_REG),
- REG(PCIE_DEV_ID_2_EP1_REG), REG(PCIE_CC_REV_ID_2_EP1_REG),
- REG(PCIE_DEV_ID_3_EP1_REG), REG(PCIE_CC_REV_ID_3_EP1_REG),
- REG(PCIE_DEV_ID_4_EP1_REG), REG(PCIE_CC_REV_ID_4_EP1_REG),
- REG(PCIE_DEV_ID_5_EP1_REG), REG(PCIE_CC_REV_ID_5_EP1_REG),
- REG(PCIE_DEV_ID_6_EP1_REG), REG(PCIE_CC_REV_ID_6_EP1_REG),
- REG(PCIE_DEV_ID_7_EP1_REG), REG(PCIE_CC_REV_ID_7_EP1_REG),
- REG(PCIE_DEV_ID_0_EP2_REG), REG(PCIE_CC_REV_ID_0_EP2_REG),
- REG(PCIE_DEV_ID_1_EP2_REG), REG(PCIE_CC_REV_ID_1_EP2_REG),
- REG(PCIE_DEV_ID_2_EP2_REG), REG(PCIE_CC_REV_ID_2_EP2_REG),
- REG(PCIE_DEV_ID_3_EP2_REG), REG(PCIE_CC_REV_ID_3_EP2_REG),
- REG(PCIE_DEV_ID_4_EP2_REG), REG(PCIE_CC_REV_ID_4_EP2_REG),
- REG(PCIE_DEV_ID_5_EP2_REG), REG(PCIE_CC_REV_ID_5_EP2_REG),
- REG(PCIE_DEV_ID_6_EP2_REG), REG(PCIE_CC_REV_ID_6_EP2_REG),
- REG(PCIE_DEV_ID_7_EP2_REG), REG(PCIE_CC_REV_ID_7_EP2_REG),
- REG(PCIE_DEV_ID_0_EP3_REG), REG(PCIE_CC_REV_ID_0_EP3_REG),
- REG(PCIE_DEV_ID_1_EP3_REG), REG(PCIE_CC_REV_ID_1_EP3_REG),
- REG(PCIE_DEV_ID_2_EP3_REG), REG(PCIE_CC_REV_ID_2_EP3_REG),
- REG(PCIE_DEV_ID_3_EP3_REG), REG(PCIE_CC_REV_ID_3_EP3_REG),
- REG(PCIE_DEV_ID_4_EP3_REG), REG(PCIE_CC_REV_ID_4_EP3_REG),
- REG(PCIE_DEV_ID_5_EP3_REG), REG(PCIE_CC_REV_ID_5_EP3_REG),
- REG(PCIE_DEV_ID_6_EP3_REG), REG(PCIE_CC_REV_ID_6_EP3_REG),
- REG(PCIE_DEV_ID_7_EP3_REG), REG(PCIE_CC_REV_ID_7_EP3_REG),
- REG(PCIE_DEV_ID_0_EP4_REG), REG(PCIE_CC_REV_ID_0_EP4_REG),
- REG(PCIE_DEV_ID_1_EP4_REG), REG(PCIE_CC_REV_ID_1_EP4_REG),
- REG(PCIE_DEV_ID_2_EP4_REG), REG(PCIE_CC_REV_ID_2_EP4_REG),
- REG(PCIE_DEV_ID_3_EP4_REG), REG(PCIE_CC_REV_ID_3_EP4_REG),
- REG(PCIE_DEV_ID_4_EP4_REG), REG(PCIE_CC_REV_ID_4_EP4_REG),
- REG(PCIE_DEV_ID_5_EP4_REG), REG(PCIE_CC_REV_ID_5_EP4_REG),
- REG(PCIE_DEV_ID_6_EP4_REG), REG(PCIE_CC_REV_ID_6_EP4_REG),
- REG(PCIE_DEV_ID_7_EP4_REG), REG(PCIE_CC_REV_ID_7_EP4_REG),
- REG(PCIE_SUBSYS_VEN_ID_REG), REG(PCIE_COMMON_CLOCK_CONFIG_0_4_0),
- REG(PCIE_MIPHYP_SSC_EN_REG), REG(PCIE_MIPHYP_ADDR_REG),
- REG(PCIE_L1_ASPM_READY_REG), REG(PCIE_EXT_CFG_RDY_REG),
- REG(PCIE_SoC_INT_ROUTER_STATUS0_REG),
- REG(PCIE_SoC_INT_ROUTER_STATUS1_REG),
- REG(PCIE_SoC_INT_ROUTER_STATUS2_REG),
- REG(PCIE_SoC_INT_ROUTER_STATUS3_REG),
- REG(DMA_IP_CTRL_REG), REG(DISP_BRIDGE_PU_PD_CTRL_REG),
- REG(VIP_PU_PD_CTRL_REG), REG(USB_MLB_PU_PD_CTRL_REG),
- REG(SDIO_PU_PD_MISCFUNC_CTRL_REG1), REG(SDIO_PU_PD_MISCFUNC_CTRL_REG2),
- REG(UART_PU_PD_CTRL_REG), REG(ARM_Lock), REG(SYS_IO_CHAR_REG1),
- REG(SYS_IO_CHAR_REG2), REG(SATA_CORE_ID_REG), REG(SATA_CTRL_REG),
- REG(I2C_HSFIX_MISC_REG), REG(SPARE2_RESERVED), REG(SPARE3_RESERVED),
- REG(MASTER_LOCK_REG), REG(SYSTEM_CONFIG_STATUS_REG),
- REG(MSP_CLK_CTRL_REG), REG(COMPENSATION_REG1), REG(COMPENSATION_REG2),
- REG(COMPENSATION_REG3), REG(TEST_CTL_REG),
+static bool sta2x11_sctl_writeable_reg(struct device *dev, unsigned int reg)
+{
+ return !__reg_within_range(reg, SCTL_SCPCIECSBRST, SCTL_SCRSTSTA);
+}
+
+static struct regmap_config sta2x11_sctl_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .lock = sta2x11_regmap_lock,
+ .unlock = sta2x11_regmap_unlock,
+ .max_register = SCTL_SCRSTSTA,
+ .writeable_reg = sta2x11_sctl_writeable_reg,
};
-#undef REG
-static struct debugfs_regset32 apb_soc_regs_regset = {
- .regs = sta2x11_apb_soc_regs_regs,
- .nregs = ARRAY_SIZE(sta2x11_apb_soc_regs_regs),
+static bool sta2x11_apbreg_readable_reg(struct device *dev, unsigned int reg)
+{
+ /* Two blocks (CAN and MLB, SARAC) 0x100 bytes apart */
+ if (reg >= APBREG_BSR_SARAC)
+ reg -= APBREG_BSR_SARAC;
+ switch (reg) {
+ case APBREG_BSR:
+ case APBREG_PAER:
+ case APBREG_PWAC:
+ case APBREG_PRAC:
+ case APBREG_PCG:
+ case APBREG_PUR:
+ case APBREG_EMU_PCG:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool sta2x11_apbreg_writeable_reg(struct device *dev, unsigned int reg)
+{
+ if (reg >= APBREG_BSR_SARAC)
+ reg -= APBREG_BSR_SARAC;
+ if (!sta2x11_apbreg_readable_reg(dev, reg))
+ return false;
+ return reg != APBREG_PAER;
+}
+
+static struct regmap_config sta2x11_apbreg_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .lock = sta2x11_regmap_lock,
+ .unlock = sta2x11_regmap_unlock,
+ .max_register = APBREG_EMU_PCG_SARAC,
+ .readable_reg = sta2x11_apbreg_readable_reg,
+ .writeable_reg = sta2x11_apbreg_writeable_reg,
};
+static bool sta2x11_apb_soc_regs_readable_reg(struct device *dev,
+ unsigned int reg)
+{
+ return reg <= PCIE_SoC_INT_ROUTER_STATUS3_REG ||
+ __reg_within_range(reg, DMA_IP_CTRL_REG, SPARE3_RESERVED) ||
+ __reg_within_range(reg, MASTER_LOCK_REG,
+ SYSTEM_CONFIG_STATUS_REG) ||
+ reg == MSP_CLK_CTRL_REG ||
+ __reg_within_range(reg, COMPENSATION_REG1, TEST_CTL_REG);
+}
-static struct dentry *sta2x11_mfd_debugfs[sta2x11_n_mfd_plat_devs];
+static bool sta2x11_apb_soc_regs_writeable_reg(struct device *dev,
+ unsigned int reg)
+{
+ if (!sta2x11_apb_soc_regs_readable_reg(dev, reg))
+ return false;
+ return (!__reg_within_range(reg, PCIE_PM_STATUS_0_PORT_0_4,
+ PCIE_PM_STATUS_7_0_EP4) &&
+ reg != PCIE_COMMON_CLOCK_CONFIG_0_4_0 &&
+ !__reg_within_range(reg, PCIE_SoC_INT_ROUTER_STATUS0_REG,
+ PCIE_SoC_INT_ROUTER_STATUS3_REG) &&
+ reg != SYSTEM_CONFIG_STATUS_REG &&
+ reg != COMPENSATION_REG1);
+}
-static struct debugfs_regset32 *sta2x11_mfd_regset[sta2x11_n_mfd_plat_devs] = {
- [sta2x11_sctl] = &sctl_regset,
- [sta2x11_apbreg] = &apbreg_regset,
- [sta2x11_apb_soc_regs] = &apb_soc_regs_regset,
+static struct regmap_config sta2x11_apb_soc_regs_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .lock = sta2x11_regmap_lock,
+ .unlock = sta2x11_regmap_unlock,
+ .max_register = TEST_CTL_REG,
+ .readable_reg = sta2x11_apb_soc_regs_readable_reg,
+ .writeable_reg = sta2x11_apb_soc_regs_writeable_reg,
};
-static const char *sta2x11_mfd_names[sta2x11_n_mfd_plat_devs] = {
- [sta2x11_sctl] = "sta2x11-sctl",
- [sta2x11_apbreg] = "sta2x11-apbreg",
- [sta2x11_apb_soc_regs] = "sta2x11-apb-soc-regs",
+static struct regmap_config *
+sta2x11_mfd_regmap_configs[sta2x11_n_mfd_plat_devs] = {
+ [sta2x11_sctl] = &sta2x11_sctl_regmap_config,
+ [sta2x11_apbreg] = &sta2x11_apbreg_regmap_config,
+ [sta2x11_apb_soc_regs] = &sta2x11_apb_soc_regs_regmap_config,
};
/* Probe for the three platform devices */
@@ -250,12 +263,14 @@ static int sta2x11_mfd_platform_probe(struct platform_device *dev,
struct sta2x11_mfd *mfd;
struct resource *res;
const char *name = sta2x11_mfd_names[index];
- struct debugfs_regset32 *regset = sta2x11_mfd_regset[index];
+ struct regmap_config *regmap_config = sta2x11_mfd_regmap_configs[index];
pdev = dev->dev.platform_data;
mfd = sta2x11_mfd_find(*pdev);
if (!mfd)
return -ENODEV;
+ if (!regmap_config)
+ return -ENODEV;
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!res)
@@ -269,10 +284,16 @@ static int sta2x11_mfd_platform_probe(struct platform_device *dev,
release_mem_region(res->start, resource_size(res));
return -ENOMEM;
}
- regset->base = mfd->regs[index];
- sta2x11_mfd_debugfs[index] = debugfs_create_regset32(name,
- S_IFREG | S_IRUGO,
- NULL, regset);
+ regmap_config->lock_arg = &mfd->lock;
+ /*
+ No caching, registers could be reached both via regmap and via
+ void __iomem *
+ */
+ regmap_config->cache_type = REGCACHE_NONE;
+ mfd->regmap = devm_regmap_init_mmio(&dev->dev, mfd->regs[index],
+ regmap_config);
+ WARN_ON(!mfd->regmap);
+
return 0;
}
diff --git a/include/linux/mfd/sta2x11-mfd.h b/include/linux/mfd/sta2x11-mfd.h
index 4d85879..8334430 100644
--- a/include/linux/mfd/sta2x11-mfd.h
+++ b/include/linux/mfd/sta2x11-mfd.h
@@ -246,6 +246,7 @@ u32 sta2x11_sctl_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val)
#define SCTL_SCPEREN1 0x20 /* Peripheral clock enable register 1 */
#define SCTL_SCPEREN2 0x24 /* Peripheral clock enable register 2 */
#define SCTL_SCGRST 0x28 /* Peripheral global reset */
+#define SCTL_SCPCIECSBRST 0x2c /* PCIe PAB CSB reset status register */
#define SCTL_SCPCIPMCR1 0x30 /* PCI power management control 1 */
#define SCTL_SCPCIPMCR2 0x34 /* PCI power management control 2 */
#define SCTL_SCPCIPMSR1 0x38 /* PCI power management status 1 */
--
1.7.10.4
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