diff options
Diffstat (limited to 'drivers/soc/sunxi/sunxi_sram.c')
| -rw-r--r-- | drivers/soc/sunxi/sunxi_sram.c | 259 |
1 files changed, 217 insertions, 42 deletions
diff --git a/drivers/soc/sunxi/sunxi_sram.c b/drivers/soc/sunxi/sunxi_sram.c index 99e354c8f53f..446b9fc1f175 100644 --- a/drivers/soc/sunxi/sunxi_sram.c +++ b/drivers/soc/sunxi/sunxi_sram.c @@ -12,17 +12,20 @@ #include <linux/debugfs.h> #include <linux/io.h> +#include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> -#include <linux/of_device.h> +#include <linux/of_platform.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/soc/sunxi/sunxi_sram.h> struct sunxi_sram_func { char *func; u8 val; + u32 reg_val; }; struct sunxi_sram_data { @@ -31,7 +34,6 @@ struct sunxi_sram_data { u8 offset; u8 width; struct sunxi_sram_func *func; - struct list_head list; }; struct sunxi_sram_desc { @@ -39,10 +41,11 @@ struct sunxi_sram_desc { bool claimed; }; -#define SUNXI_SRAM_MAP(_val, _func) \ +#define SUNXI_SRAM_MAP(_reg_val, _val, _func) \ { \ .func = _func, \ .val = _val, \ + .reg_val = _reg_val, \ } #define SUNXI_SRAM_DATA(_name, _reg, _off, _width, ...) \ @@ -57,14 +60,26 @@ struct sunxi_sram_desc { static struct sunxi_sram_desc sun4i_a10_sram_a3_a4 = { .data = SUNXI_SRAM_DATA("A3-A4", 0x4, 0x4, 2, - SUNXI_SRAM_MAP(0, "cpu"), - SUNXI_SRAM_MAP(1, "emac")), + SUNXI_SRAM_MAP(0, 0, "cpu"), + SUNXI_SRAM_MAP(1, 1, "emac")), +}; + +static struct sunxi_sram_desc sun4i_a10_sram_c1 = { + .data = SUNXI_SRAM_DATA("C1", 0x0, 0x0, 31, + SUNXI_SRAM_MAP(0, 0, "cpu"), + SUNXI_SRAM_MAP(0x7fffffff, 1, "ve")), }; static struct sunxi_sram_desc sun4i_a10_sram_d = { .data = SUNXI_SRAM_DATA("D", 0x4, 0x0, 1, - SUNXI_SRAM_MAP(0, "cpu"), - SUNXI_SRAM_MAP(1, "usb-otg")), + SUNXI_SRAM_MAP(0, 0, "cpu"), + SUNXI_SRAM_MAP(1, 1, "usb-otg")), +}; + +static struct sunxi_sram_desc sun50i_a64_sram_c = { + .data = SUNXI_SRAM_DATA("C", 0x4, 24, 1, + SUNXI_SRAM_MAP(1, 0, "cpu"), + SUNXI_SRAM_MAP(0, 1, "de2")), }; static const struct of_device_id sunxi_sram_dt_ids[] = { @@ -73,14 +88,21 @@ static const struct of_device_id sunxi_sram_dt_ids[] = { .data = &sun4i_a10_sram_a3_a4.data, }, { + .compatible = "allwinner,sun4i-a10-sram-c1", + .data = &sun4i_a10_sram_c1.data, + }, + { .compatible = "allwinner,sun4i-a10-sram-d", .data = &sun4i_a10_sram_d.data, }, + { + .compatible = "allwinner,sun50i-a64-sram-c", + .data = &sun50i_a64_sram_c.data, + }, {} }; static struct device *sram_dev; -static LIST_HEAD(claimed_sram); static DEFINE_SPINLOCK(sram_lock); static void __iomem *base; @@ -97,6 +119,9 @@ static int sunxi_sram_show(struct seq_file *s, void *data) seq_puts(s, "--------------------\n\n"); for_each_child_of_node(sram_dev->of_node, sram_node) { + if (!of_device_is_compatible(sram_node, "mmio-sram")) + continue; + sram_addr_p = of_get_address(sram_node, 0, NULL, NULL); seq_printf(s, "sram@%08x\n", @@ -121,7 +146,8 @@ static int sunxi_sram_show(struct seq_file *s, void *data) for (func = sram_data->func; func->func; func++) { seq_printf(s, "\t\t%s%c\n", func->func, - func->val == val ? '*' : ' '); + func->reg_val == val ? + '*' : ' '); } } @@ -131,17 +157,7 @@ static int sunxi_sram_show(struct seq_file *s, void *data) return 0; } -static int sunxi_sram_open(struct inode *inode, struct file *file) -{ - return single_open(file, sunxi_sram_show, inode->i_private); -} - -static const struct file_operations sunxi_sram_fops = { - .open = sunxi_sram_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; +DEFINE_SHOW_ATTRIBUTE(sunxi_sram); static inline struct sunxi_sram_desc *to_sram_desc(const struct sunxi_sram_data *data) { @@ -149,10 +165,13 @@ static inline struct sunxi_sram_desc *to_sram_desc(const struct sunxi_sram_data } static const struct sunxi_sram_data *sunxi_sram_of_parse(struct device_node *node, - unsigned int *value) + unsigned int *reg_value) { const struct of_device_id *match; + const struct sunxi_sram_data *data; + struct sunxi_sram_func *func; struct of_phandle_args args; + u8 val; int ret; ret = of_parse_phandle_with_fixed_args(node, "allwinner,sram", 1, 0, @@ -165,8 +184,7 @@ static const struct sunxi_sram_data *sunxi_sram_of_parse(struct device_node *nod goto err; } - if (value) - *value = args.args[0]; + val = args.args[0]; match = of_match_node(sunxi_sram_dt_ids, args.np); if (!match) { @@ -174,6 +192,26 @@ static const struct sunxi_sram_data *sunxi_sram_of_parse(struct device_node *nod goto err; } + data = match->data; + if (!data) { + ret = -EINVAL; + goto err; + } + + for (func = data->func; func->func; func++) { + if (val == func->val) { + if (reg_value) + *reg_value = func->reg_val; + + break; + } + } + + if (!func->func) { + ret = -EINVAL; + goto err; + } + of_node_put(args.np); return match->data; @@ -190,6 +228,9 @@ int sunxi_sram_claim(struct device *dev) u32 val, mask; if (IS_ERR(base)) + return PTR_ERR(base); + + if (!base) return -EPROBE_DEFER; if (!dev || !dev->of_node) @@ -215,58 +256,194 @@ int sunxi_sram_claim(struct device *dev) writel(val | ((device << sram_data->offset) & mask), base + sram_data->reg); + sram_desc->claimed = true; spin_unlock(&sram_lock); return 0; } EXPORT_SYMBOL(sunxi_sram_claim); -int sunxi_sram_release(struct device *dev) +void sunxi_sram_release(struct device *dev) { const struct sunxi_sram_data *sram_data; struct sunxi_sram_desc *sram_desc; if (!dev || !dev->of_node) - return -EINVAL; + return; sram_data = sunxi_sram_of_parse(dev->of_node, NULL); if (IS_ERR(sram_data)) - return -EINVAL; + return; sram_desc = to_sram_desc(sram_data); spin_lock(&sram_lock); sram_desc->claimed = false; spin_unlock(&sram_lock); - - return 0; } EXPORT_SYMBOL(sunxi_sram_release); -static int sunxi_sram_probe(struct platform_device *pdev) +struct sunxi_sramc_variant { + int num_emac_clocks; + bool has_ldo_ctrl; + bool has_ths_offset; +}; + +static const struct sunxi_sramc_variant sun4i_a10_sramc_variant = { + /* Nothing special */ +}; + +static const struct sunxi_sramc_variant sun8i_h3_sramc_variant = { + .num_emac_clocks = 1, +}; + +static const struct sunxi_sramc_variant sun20i_d1_sramc_variant = { + .num_emac_clocks = 1, + .has_ldo_ctrl = true, +}; + +static const struct sunxi_sramc_variant sun50i_a64_sramc_variant = { + .num_emac_clocks = 1, +}; + +static const struct sunxi_sramc_variant sun50i_h616_sramc_variant = { + .num_emac_clocks = 2, + .has_ths_offset = true, +}; + +static const struct sunxi_sramc_variant sun55i_a523_sramc_variant = { + .num_emac_clocks = 2, +}; + +#define SUNXI_SRAM_THS_OFFSET_REG 0x0 +#define SUNXI_SRAM_EMAC_CLOCK_REG 0x30 +#define SUNXI_SYS_LDO_CTRL_REG 0x150 + +static bool sunxi_sram_regmap_accessible_reg(struct device *dev, + unsigned int reg) +{ + const struct sunxi_sramc_variant *variant = dev_get_drvdata(dev); + + if (reg == SUNXI_SRAM_THS_OFFSET_REG && variant->has_ths_offset) + return true; + if (reg >= SUNXI_SRAM_EMAC_CLOCK_REG && + reg < SUNXI_SRAM_EMAC_CLOCK_REG + variant->num_emac_clocks * 4) + return true; + if (reg == SUNXI_SYS_LDO_CTRL_REG && variant->has_ldo_ctrl) + return true; + + return false; +} + +static void sunxi_sram_lock(void *_lock) { - struct resource *res; - struct dentry *d; + spinlock_t *lock = _lock; + + spin_lock(lock); +} + +static void sunxi_sram_unlock(void *_lock) +{ + spinlock_t *lock = _lock; + + spin_unlock(lock); +} + +static const struct regmap_config sunxi_sram_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + /* last defined register */ + .max_register = SUNXI_SYS_LDO_CTRL_REG, + /* other devices have no business accessing other registers */ + .readable_reg = sunxi_sram_regmap_accessible_reg, + .writeable_reg = sunxi_sram_regmap_accessible_reg, + .lock = sunxi_sram_lock, + .unlock = sunxi_sram_unlock, + .lock_arg = &sram_lock, +}; + +static int __init sunxi_sram_probe(struct platform_device *pdev) +{ + const struct sunxi_sramc_variant *variant; + struct device *dev = &pdev->dev; + struct regmap *regmap; + int ret; sram_dev = &pdev->dev; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - base = devm_ioremap_resource(&pdev->dev, res); + variant = of_device_get_match_data(&pdev->dev); + if (!variant) + return -EINVAL; + + dev_set_drvdata(dev, (struct sunxi_sramc_variant *)variant); + + base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) return PTR_ERR(base); - of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); + if (variant->num_emac_clocks || variant->has_ldo_ctrl) { + regmap = devm_regmap_init_mmio(dev, base, &sunxi_sram_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + ret = of_syscon_register_regmap(dev->of_node, regmap); + if (ret) + return ret; + } + + of_platform_populate(dev->of_node, NULL, NULL, dev); - d = debugfs_create_file("sram", S_IRUGO, NULL, NULL, - &sunxi_sram_fops); - if (!d) - return -ENOMEM; + debugfs_create_file("sram", 0444, NULL, NULL, &sunxi_sram_fops); return 0; } static const struct of_device_id sunxi_sram_dt_match[] = { - { .compatible = "allwinner,sun4i-a10-sram-controller" }, + { + .compatible = "allwinner,sun4i-a10-sram-controller", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun4i-a10-system-control", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun5i-a13-system-control", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun8i-a23-system-control", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun8i-h3-system-control", + .data = &sun8i_h3_sramc_variant, + }, + { + .compatible = "allwinner,sun20i-d1-system-control", + .data = &sun20i_d1_sramc_variant, + }, + { + .compatible = "allwinner,sun50i-a64-sram-controller", + .data = &sun50i_a64_sramc_variant, + }, + { + .compatible = "allwinner,sun50i-a64-system-control", + .data = &sun50i_a64_sramc_variant, + }, + { + .compatible = "allwinner,sun50i-h5-system-control", + .data = &sun50i_a64_sramc_variant, + }, + { + .compatible = "allwinner,sun50i-h616-system-control", + .data = &sun50i_h616_sramc_variant, + }, + { + .compatible = "allwinner,sun55i-a523-system-control", + .data = &sun55i_a523_sramc_variant, + }, { }, }; MODULE_DEVICE_TABLE(of, sunxi_sram_dt_match); @@ -276,10 +453,8 @@ static struct platform_driver sunxi_sram_driver = { .name = "sunxi-sram", .of_match_table = sunxi_sram_dt_match, }, - .probe = sunxi_sram_probe, }; -module_platform_driver(sunxi_sram_driver); +builtin_platform_driver_probe(sunxi_sram_driver, sunxi_sram_probe); MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); MODULE_DESCRIPTION("Allwinner sunXi SRAM Controller Driver"); -MODULE_LICENSE("GPL"); |