diff options
author | Lee Jones <lee.jones@linaro.org> | 2014-07-09 12:41:13 +0100 |
---|---|---|
committer | Kishon Vijay Abraham I <kishon@ti.com> | 2014-07-22 12:46:43 +0530 |
commit | 7ebdb52e192c4d496a9b3a87d47eba3eba3e1fd4 (patch) | |
tree | 347ff06a4e07e16f73a1e0f56912961ee51670b1 /drivers/phy/phy-miphy365x.c | |
parent | 6e877fedb1cff0f4a0988d30418ad87abaefafcb (diff) |
phy: miphy365x: Represent each PHY channel as a DT subnode
This has the added advantages of being able to enable/disable each
of the channels as simply as enabling/disabling the DT node.
Suggested-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/phy/phy-miphy365x.c')
-rw-r--r-- | drivers/phy/phy-miphy365x.c | 256 |
1 files changed, 138 insertions, 118 deletions
diff --git a/drivers/phy/phy-miphy365x.c b/drivers/phy/phy-miphy365x.c index 65ecd04da9b..e111baf187c 100644 --- a/drivers/phy/phy-miphy365x.c +++ b/drivers/phy/phy-miphy365x.c @@ -18,6 +18,7 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_platform.h> +#include <linux/of_address.h> #include <linux/clk.h> #include <linux/phy/phy.h> #include <linux/delay.h> @@ -28,10 +29,8 @@ #define HFC_TIMEOUT 100 -#define SYSCFG_2521 0x824 -#define SYSCFG_2522 0x828 -#define SYSCFG_PCIE_SATA_MASK BIT(1) -#define SYSCFG_PCIE_SATA_POS 1 +#define SYSCFG_SELECT_SATA_MASK BIT(1) +#define SYSCFG_SELECT_SATA_POS 1 /* MiPHY365x register definitions */ #define RESET_REG 0x00 @@ -136,25 +135,21 @@ #define BIT_LOCK_LEVEL 0x01 #define BIT_LOCK_CNT_512 (0x03 << 5) -static u8 ports[] = { MIPHY_PORT_0, MIPHY_PORT_1 }; - struct miphy365x_phy { struct phy *phy; void __iomem *base; - void __iomem *sata; - void __iomem *pcie; + bool pcie_tx_pol_inv; + bool sata_tx_pol_inv; + u32 sata_gen; + u64 ctrlreg; u8 type; - u8 port; }; struct miphy365x_dev { struct device *dev; struct regmap *regmap; struct mutex miphy_mutex; - struct miphy365x phys[ARRAY_SIZE(ports)]; - bool pcie_tx_pol_inv; - bool sata_tx_pol_inv; - u32 sata_gen; + struct miphy365x_phy **phys; }; /* @@ -180,27 +175,12 @@ static u8 rx_tx_spd[] = { static int miphy365x_set_path(struct miphy365x_phy *miphy_phy, struct miphy365x_dev *miphy_dev) { - u8 config = miphy_phy->type | miphy_phy->port; - u32 mask = SYSCFG_PCIE_SATA_MASK; - u32 reg; - bool sata; - - switch (config) { - case MIPHY_SATA_PORT0: - reg = SYSCFG_2521; - sata = true; - break; - case MIPHY_PCIE_PORT1: - reg = SYSCFG_2522; - sata = false; - break; - default: - dev_err(miphy_dev->dev, "Configuration not supported\n"); - return -EINVAL; - } + bool sata = (miphy_phy->type == MIPHY_TYPE_SATA); - return regmap_update_bits(miphy_dev->regmap, reg, mask, - sata << SYSCFG_PCIE_SATA_POS); + return regmap_update_bits(miphy_dev->regmap, + (unsigned int)miphy_phy->ctrlreg, + SYSCFG_SELECT_SATA_MASK, + sata << SYSCFG_SELECT_SATA_POS); } static int miphy365x_init_pcie_port(struct miphy365x_phy *miphy_phy, @@ -261,14 +241,14 @@ static inline void miphy365x_set_comp(struct miphy365x_phy *miphy_phy, { u8 val, mask; - if (miphy_dev->sata_gen == SATA_GEN1) + if (miphy_phy->sata_gen == SATA_GEN1) writeb_relaxed(COMP_2MHZ_RAT_GEN1, miphy_phy->base + COMP_CTRL2_REG); else writeb_relaxed(COMP_2MHZ_RAT, miphy_phy->base + COMP_CTRL2_REG); - if (miphy_dev->sata_gen != SATA_GEN3) { + if (miphy_phy->sata_gen != SATA_GEN3) { writeb_relaxed(COMSR_COMP_REF, miphy_phy->base + COMP_CTRL3_REG); /* @@ -312,7 +292,7 @@ static inline void miphy365x_set_ssc(struct miphy365x_phy *miphy_phy, miphy_phy->base + PLL_SSC_PER_LSB_REG); /* SSC Settings complete */ - if (miphy_dev->sata_gen == SATA_GEN1) { + if (miphy_phy->sata_gen == SATA_GEN1) { val = PLL_START_CAL | BUF_EN | SYNCHRO_TX | CONFIG_PLL; writeb_relaxed(val, miphy_phy->base + PLL_CTRL1_REG); } else { @@ -334,7 +314,7 @@ static int miphy365x_init_sata_port(struct miphy365x_phy *miphy_phy, val = RST_PLL | RST_PLL_CAL | RST_RX | RST_MACRO; writeb_relaxed(val, miphy_phy->base + RESET_REG); - if (miphy_dev->sata_tx_pol_inv) + if (miphy_phy->sata_tx_pol_inv) writeb_relaxed(TX_POL, miphy_phy->base + CTRL_REG); /* @@ -344,7 +324,7 @@ static int miphy365x_init_sata_port(struct miphy365x_phy *miphy_phy, */ writeb_relaxed(SPDSEL_SEL, miphy_phy->base + BOUNDARY1_REG); writeb_relaxed(START_CLK_HF, miphy_phy->base + IDLL_TEST_REG); - val = rx_tx_spd[miphy_dev->sata_gen]; + val = rx_tx_spd[miphy_phy->sata_gen]; writeb_relaxed(val, miphy_phy->base + BOUNDARY3_REG); /* Wait for HFC_READY = 0 */ @@ -355,7 +335,7 @@ static int miphy365x_init_sata_port(struct miphy365x_phy *miphy_phy, /* Compensation Recalibration */ miphy365x_set_comp(miphy_phy, miphy_dev); - switch (miphy_dev->sata_gen) { + switch (miphy_phy->sata_gen) { case SATA_GEN3: /* * TX Swing target 550-600mv peak to peak diff @@ -423,7 +403,7 @@ static int miphy365x_init_sata_port(struct miphy365x_phy *miphy_phy, writeb_relaxed(0x00, miphy_phy->base + BOUNDARY1_REG); writeb_relaxed(0x00, miphy_phy->base + IDLL_TEST_REG); writeb_relaxed(RST_RX, miphy_phy->base + RESET_REG); - val = miphy_dev->sata_tx_pol_inv ? + val = miphy_phy->sata_tx_pol_inv ? (TX_POL | DES_BIT_LOCK_EN) : DES_BIT_LOCK_EN; writeb_relaxed(val, miphy_phy->base + CTRL_REG); @@ -459,40 +439,95 @@ static int miphy365x_init(struct phy *phy) return ret; } +int miphy365x_get_addr(struct device *dev, struct miphy365x_phy *miphy_phy, + int index) +{ + struct device_node *phynode = miphy_phy->phy->dev.of_node; + const char *name; + const __be32 *taddr; + int type = miphy_phy->type; + int ret; + + ret = of_property_read_string_index(phynode, "reg-names", index, &name); + if (ret) { + dev_err(dev, "no reg-names property not found\n"); + return ret; + } + + if (!strncmp(name, "syscfg", 6)) { + taddr = of_get_address(phynode, index, NULL, NULL); + if (!taddr) { + dev_err(dev, "failed to fetch syscfg address\n"); + return -EINVAL; + } + + miphy_phy->ctrlreg = of_translate_address(phynode, taddr); + if (miphy_phy->ctrlreg == OF_BAD_ADDR) { + dev_err(dev, "failed to translate syscfg address\n"); + return -EINVAL; + } + + return 0; + } + + if (!((!strncmp(name, "sata", 4) && type == MIPHY_TYPE_SATA) || + (!strncmp(name, "pcie", 4) && type == MIPHY_TYPE_PCIE))) + return 0; + + miphy_phy->base = of_iomap(phynode, index); + if (!miphy_phy->base) { + dev_err(dev, "Failed to map %s\n", phynode->full_name); + return -EINVAL; + } + + return 0; +} + static struct phy *miphy365x_xlate(struct device *dev, struct of_phandle_args *args) { - struct miphy365x_dev *state = dev_get_drvdata(dev); - u8 port, type; + struct miphy365x_dev *miphy_dev = dev_get_drvdata(dev); + struct miphy365x_phy *miphy_phy = NULL; + struct device_node *phynode = args->np; + int ret, index; + + if (!of_device_is_available(phynode)) { + dev_warn(dev, "Requested PHY is disabled\n"); + return ERR_PTR(-ENODEV); + } - if (args->count != 2) { + if (args->args_count != 1) { dev_err(dev, "Invalid number of cells in 'phy' property\n"); return ERR_PTR(-EINVAL); } - if (args->args[0] & 0xFFFFFF00 || args->args[1] & 0xFFFFFF00) { - dev_err(dev, "Unsupported flags set in 'phy' property\n"); + for (index = 0; index < of_get_child_count(dev->of_node); index++) + if (phynode == miphy_dev->phys[index]->phy->dev.of_node) { + miphy_phy = miphy_dev->phys[index]; + break; + } + + if (!miphy_phy) { + dev_err(dev, "Failed to find appropriate phy\n"); return ERR_PTR(-EINVAL); } - port = args->args[0]; - type = args->args[1]; - - if (WARN_ON(port >= ARRAY_SIZE(ports))) - return ERR_PTR(-EINVAL); + miphy_phy->type = args->args[0]; - if (type == MIPHY_TYPE_SATA) - state->phys[port].base = state->phys[port].sata; - else if (type == MIPHY_TYPE_PCIE) - state->phys[port].base = state->phys[port].pcie; - else { - WARN(1, "Invalid type specified in DT"); + if (!(miphy_phy->type == MIPHY_TYPE_SATA || + miphy_phy->type == MIPHY_TYPE_PCIE)) { + dev_err(dev, "Unsupported device type: %d\n", miphy_phy->type); return ERR_PTR(-EINVAL); } - state->phys[port].type = type; + /* Each port handles SATA and PCIE - third entry is always sysconf. */ + for (index = 0; index < 3; index++) { + ret = miphy365x_get_addr(dev, miphy_phy, index); + if (ret < 0) + return ERR_PTR(ret); + } - return state->phys[port].phy; + return miphy_phy->phy; } static struct phy_ops miphy365x_ops = { @@ -500,95 +535,80 @@ static struct phy_ops miphy365x_ops = { .owner = THIS_MODULE, }; -static int miphy365x_get_base_addr(struct platform_device *pdev, - struct miphy365x_phy *phy, u8 port) +static int miphy365x_of_probe(struct device_node *phynode, + struct miphy365x_phy *miphy_phy) { - struct resource *res; - char type[6]; + of_property_read_u32(phynode, "st,sata-gen", &miphy_phy->sata_gen); + if (!miphy_phy->sata_gen) + miphy_phy->sata_gen = SATA_GEN1; - sprintf(type, "sata%d", port); + miphy_phy->pcie_tx_pol_inv = + of_property_read_bool(phynode, "st,pcie-tx-pol-inv"); - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type); - phy->sata = devm_ioremap_resource(&pdev->dev, res)); - if (!phy->sata) - return -ENOMEM; - - sprintf(type, "pcie%d", port); - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, type); - phy->pcie = devm_ioremap_resource(&pdev->dev, res)); - if (!phy->pcie) - return -ENOMEM; - - return 0; -} - -static int miphy365x_of_probe(struct device_node *np, - struct miphy365x_dev *phy_dev) -{ - phy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); - if (IS_ERR(phy_dev->regmap)) { - dev_err(phy_dev->dev, "No syscfg phandle specified\n"); - return PTR_ERR(phy_dev->regmap); - } - - of_property_read_u32(np, "st,sata-gen", &phy_dev->sata_gen); - if (!phy_dev->sata_gen) - phy_dev->sata_gen = SATA_GEN1; - - phy_dev->pcie_tx_pol_inv = - of_property_read_bool(np, "st,pcie-tx-pol-inv"); - - phy_dev->sata_tx_pol_inv = - of_property_read_bool(np, "st,sata-tx-pol-inv"); + miphy_phy->sata_tx_pol_inv = + of_property_read_bool(phynode, "st,sata-tx-pol-inv"); return 0; } static int miphy365x_probe(struct platform_device *pdev) { - struct device_node *np = pdev->dev.of_node; - struct miphy365x_dev *phy_dev; - struct device *dev = &pdev->dev; + struct device_node *child, *np = pdev->dev.of_node; + struct miphy365x_dev *miphy_dev; struct phy_provider *provider; - u8 port; + struct phy *phy; + int chancount, port = 0; int ret; - phy_dev = devm_kzalloc(dev, sizeof(*phy_dev), GFP_KERNEL); - if (!phy_dev) + miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL); + if (!miphy_dev) return -ENOMEM; - ret = miphy365x_of_probe(np, phy_dev); - if (ret) - return ret; + chancount = of_get_child_count(np); + miphy_dev->phys = devm_kzalloc(&pdev->dev, sizeof(phy) * chancount, + GFP_KERNEL); + if (!miphy_dev->phys) + return -ENOMEM; + + miphy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); + if (IS_ERR(miphy_dev->regmap)) { + dev_err(miphy_dev->dev, "No syscfg phandle specified\n"); + return PTR_ERR(miphy_dev->regmap); + } + + miphy_dev->dev = &pdev->dev; + + dev_set_drvdata(&pdev->dev, miphy_dev); - phy_dev->dev = dev; + mutex_init(&miphy_dev->miphy_mutex); - dev_set_drvdata(dev, phy_dev); + for_each_child_of_node(np, child) { + struct miphy365x_phy *miphy_phy; - mutex_init(&phy_dev->miphy_mutex); + miphy_phy = devm_kzalloc(&pdev->dev, sizeof(*miphy_phy), + GFP_KERNEL); + if (!miphy_phy) + return -ENOMEM; - for (port = 0; port < ARRAY_SIZE(ports); port++) { - struct phy *phy; + miphy_dev->phys[port] = miphy_phy; - phy = devm_phy_create(dev, &miphy365x_ops, NULL); + phy = devm_phy_create(&pdev->dev, child, &miphy365x_ops, NULL); if (IS_ERR(phy)) { - dev_err(dev, "failed to create PHY on port %d\n", port); + dev_err(&pdev->dev, "failed to create PHY\n"); return PTR_ERR(phy); } - phy_dev->phys[port].phy = phy; - phy_dev->phys[port].port = port; + miphy_dev->phys[port]->phy = phy; - ret = miphy365x_get_base_addr(pdev, - &phy_dev->phys[port], port); + ret = miphy365x_of_probe(child, miphy_phy); if (ret) return ret; - phy_set_drvdata(phy, &phy_dev->phys[port]); + phy_set_drvdata(phy, miphy_dev->phys[port]); + port++; } - provider = devm_of_phy_provider_register(dev, miphy365x_xlate); + provider = devm_of_phy_provider_register(&pdev->dev, miphy365x_xlate); if (IS_ERR(provider)) return PTR_ERR(provider); |