180a7581fSIrina Tirdea /* 280a7581fSIrina Tirdea * Intel Atom SOC Power Management Controller Driver 380a7581fSIrina Tirdea * Copyright (c) 2014, Intel Corporation. 480a7581fSIrina Tirdea * 580a7581fSIrina Tirdea * This program is free software; you can redistribute it and/or modify it 680a7581fSIrina Tirdea * under the terms and conditions of the GNU General Public License, 780a7581fSIrina Tirdea * version 2, as published by the Free Software Foundation. 880a7581fSIrina Tirdea * 980a7581fSIrina Tirdea * This program is distributed in the hope it will be useful, but WITHOUT 1080a7581fSIrina Tirdea * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1180a7581fSIrina Tirdea * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1280a7581fSIrina Tirdea * more details. 1380a7581fSIrina Tirdea * 1480a7581fSIrina Tirdea */ 1580a7581fSIrina Tirdea 1680a7581fSIrina Tirdea #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 1780a7581fSIrina Tirdea 1880a7581fSIrina Tirdea #include <linux/debugfs.h> 1980a7581fSIrina Tirdea #include <linux/device.h> 207c2e0713SDavid Müller #include <linux/dmi.h> 2180a7581fSIrina Tirdea #include <linux/init.h> 2280a7581fSIrina Tirdea #include <linux/io.h> 23282a4e4cSIrina Tirdea #include <linux/platform_data/x86/clk-pmc-atom.h> 2480a7581fSIrina Tirdea #include <linux/platform_data/x86/pmc_atom.h> 25282a4e4cSIrina Tirdea #include <linux/platform_device.h> 2680a7581fSIrina Tirdea #include <linux/pci.h> 2780a7581fSIrina Tirdea #include <linux/seq_file.h> 2880a7581fSIrina Tirdea 2980a7581fSIrina Tirdea struct pmc_bit_map { 3080a7581fSIrina Tirdea const char *name; 3180a7581fSIrina Tirdea u32 bit_mask; 3280a7581fSIrina Tirdea }; 3380a7581fSIrina Tirdea 3480a7581fSIrina Tirdea struct pmc_reg_map { 3580a7581fSIrina Tirdea const struct pmc_bit_map *d3_sts_0; 3680a7581fSIrina Tirdea const struct pmc_bit_map *d3_sts_1; 3780a7581fSIrina Tirdea const struct pmc_bit_map *func_dis; 3880a7581fSIrina Tirdea const struct pmc_bit_map *func_dis_2; 3980a7581fSIrina Tirdea const struct pmc_bit_map *pss; 4080a7581fSIrina Tirdea }; 4180a7581fSIrina Tirdea 42282a4e4cSIrina Tirdea struct pmc_data { 43282a4e4cSIrina Tirdea const struct pmc_reg_map *map; 44282a4e4cSIrina Tirdea const struct pmc_clk *clks; 45282a4e4cSIrina Tirdea }; 46282a4e4cSIrina Tirdea 4780a7581fSIrina Tirdea struct pmc_dev { 4880a7581fSIrina Tirdea u32 base_addr; 4980a7581fSIrina Tirdea void __iomem *regmap; 5080a7581fSIrina Tirdea const struct pmc_reg_map *map; 5180a7581fSIrina Tirdea #ifdef CONFIG_DEBUG_FS 5280a7581fSIrina Tirdea struct dentry *dbgfs_dir; 5380a7581fSIrina Tirdea #endif /* CONFIG_DEBUG_FS */ 5480a7581fSIrina Tirdea bool init; 5580a7581fSIrina Tirdea }; 5680a7581fSIrina Tirdea 5780a7581fSIrina Tirdea static struct pmc_dev pmc_device; 5880a7581fSIrina Tirdea static u32 acpi_base_addr; 5980a7581fSIrina Tirdea 60282a4e4cSIrina Tirdea static const struct pmc_clk byt_clks[] = { 61282a4e4cSIrina Tirdea { 62282a4e4cSIrina Tirdea .name = "xtal", 63282a4e4cSIrina Tirdea .freq = 25000000, 64282a4e4cSIrina Tirdea .parent_name = NULL, 65282a4e4cSIrina Tirdea }, 66282a4e4cSIrina Tirdea { 67282a4e4cSIrina Tirdea .name = "pll", 68282a4e4cSIrina Tirdea .freq = 19200000, 69282a4e4cSIrina Tirdea .parent_name = "xtal", 70282a4e4cSIrina Tirdea }, 71282a4e4cSIrina Tirdea {}, 72282a4e4cSIrina Tirdea }; 73282a4e4cSIrina Tirdea 74282a4e4cSIrina Tirdea static const struct pmc_clk cht_clks[] = { 75282a4e4cSIrina Tirdea { 76282a4e4cSIrina Tirdea .name = "xtal", 77282a4e4cSIrina Tirdea .freq = 19200000, 78282a4e4cSIrina Tirdea .parent_name = NULL, 79282a4e4cSIrina Tirdea }, 80282a4e4cSIrina Tirdea {}, 81282a4e4cSIrina Tirdea }; 82282a4e4cSIrina Tirdea 8380a7581fSIrina Tirdea static const struct pmc_bit_map d3_sts_0_map[] = { 8480a7581fSIrina Tirdea {"LPSS1_F0_DMA", BIT_LPSS1_F0_DMA}, 8580a7581fSIrina Tirdea {"LPSS1_F1_PWM1", BIT_LPSS1_F1_PWM1}, 8680a7581fSIrina Tirdea {"LPSS1_F2_PWM2", BIT_LPSS1_F2_PWM2}, 8780a7581fSIrina Tirdea {"LPSS1_F3_HSUART1", BIT_LPSS1_F3_HSUART1}, 8880a7581fSIrina Tirdea {"LPSS1_F4_HSUART2", BIT_LPSS1_F4_HSUART2}, 8980a7581fSIrina Tirdea {"LPSS1_F5_SPI", BIT_LPSS1_F5_SPI}, 9080a7581fSIrina Tirdea {"LPSS1_F6_Reserved", BIT_LPSS1_F6_XXX}, 9180a7581fSIrina Tirdea {"LPSS1_F7_Reserved", BIT_LPSS1_F7_XXX}, 9280a7581fSIrina Tirdea {"SCC_EMMC", BIT_SCC_EMMC}, 9380a7581fSIrina Tirdea {"SCC_SDIO", BIT_SCC_SDIO}, 9480a7581fSIrina Tirdea {"SCC_SDCARD", BIT_SCC_SDCARD}, 9580a7581fSIrina Tirdea {"SCC_MIPI", BIT_SCC_MIPI}, 9680a7581fSIrina Tirdea {"HDA", BIT_HDA}, 9780a7581fSIrina Tirdea {"LPE", BIT_LPE}, 9880a7581fSIrina Tirdea {"OTG", BIT_OTG}, 9980a7581fSIrina Tirdea {"USH", BIT_USH}, 10080a7581fSIrina Tirdea {"GBE", BIT_GBE}, 10180a7581fSIrina Tirdea {"SATA", BIT_SATA}, 10280a7581fSIrina Tirdea {"USB_EHCI", BIT_USB_EHCI}, 10380a7581fSIrina Tirdea {"SEC", BIT_SEC}, 10480a7581fSIrina Tirdea {"PCIE_PORT0", BIT_PCIE_PORT0}, 10580a7581fSIrina Tirdea {"PCIE_PORT1", BIT_PCIE_PORT1}, 10680a7581fSIrina Tirdea {"PCIE_PORT2", BIT_PCIE_PORT2}, 10780a7581fSIrina Tirdea {"PCIE_PORT3", BIT_PCIE_PORT3}, 10880a7581fSIrina Tirdea {"LPSS2_F0_DMA", BIT_LPSS2_F0_DMA}, 10980a7581fSIrina Tirdea {"LPSS2_F1_I2C1", BIT_LPSS2_F1_I2C1}, 11080a7581fSIrina Tirdea {"LPSS2_F2_I2C2", BIT_LPSS2_F2_I2C2}, 11180a7581fSIrina Tirdea {"LPSS2_F3_I2C3", BIT_LPSS2_F3_I2C3}, 11280a7581fSIrina Tirdea {"LPSS2_F3_I2C4", BIT_LPSS2_F4_I2C4}, 11380a7581fSIrina Tirdea {"LPSS2_F5_I2C5", BIT_LPSS2_F5_I2C5}, 11480a7581fSIrina Tirdea {"LPSS2_F6_I2C6", BIT_LPSS2_F6_I2C6}, 11580a7581fSIrina Tirdea {"LPSS2_F7_I2C7", BIT_LPSS2_F7_I2C7}, 11680a7581fSIrina Tirdea {}, 11780a7581fSIrina Tirdea }; 11880a7581fSIrina Tirdea 11980a7581fSIrina Tirdea static struct pmc_bit_map byt_d3_sts_1_map[] = { 12080a7581fSIrina Tirdea {"SMB", BIT_SMB}, 12180a7581fSIrina Tirdea {"OTG_SS_PHY", BIT_OTG_SS_PHY}, 12280a7581fSIrina Tirdea {"USH_SS_PHY", BIT_USH_SS_PHY}, 12380a7581fSIrina Tirdea {"DFX", BIT_DFX}, 12480a7581fSIrina Tirdea {}, 12580a7581fSIrina Tirdea }; 12680a7581fSIrina Tirdea 12780a7581fSIrina Tirdea static struct pmc_bit_map cht_d3_sts_1_map[] = { 12880a7581fSIrina Tirdea {"SMB", BIT_SMB}, 12980a7581fSIrina Tirdea {"GMM", BIT_STS_GMM}, 13080a7581fSIrina Tirdea {"ISH", BIT_STS_ISH}, 13180a7581fSIrina Tirdea {}, 13280a7581fSIrina Tirdea }; 13380a7581fSIrina Tirdea 13480a7581fSIrina Tirdea static struct pmc_bit_map cht_func_dis_2_map[] = { 13580a7581fSIrina Tirdea {"SMB", BIT_SMB}, 13680a7581fSIrina Tirdea {"GMM", BIT_FD_GMM}, 13780a7581fSIrina Tirdea {"ISH", BIT_FD_ISH}, 13880a7581fSIrina Tirdea {}, 13980a7581fSIrina Tirdea }; 14080a7581fSIrina Tirdea 14180a7581fSIrina Tirdea static const struct pmc_bit_map byt_pss_map[] = { 14280a7581fSIrina Tirdea {"GBE", PMC_PSS_BIT_GBE}, 14380a7581fSIrina Tirdea {"SATA", PMC_PSS_BIT_SATA}, 14480a7581fSIrina Tirdea {"HDA", PMC_PSS_BIT_HDA}, 14580a7581fSIrina Tirdea {"SEC", PMC_PSS_BIT_SEC}, 14680a7581fSIrina Tirdea {"PCIE", PMC_PSS_BIT_PCIE}, 14780a7581fSIrina Tirdea {"LPSS", PMC_PSS_BIT_LPSS}, 14880a7581fSIrina Tirdea {"LPE", PMC_PSS_BIT_LPE}, 14980a7581fSIrina Tirdea {"DFX", PMC_PSS_BIT_DFX}, 15080a7581fSIrina Tirdea {"USH_CTRL", PMC_PSS_BIT_USH_CTRL}, 15180a7581fSIrina Tirdea {"USH_SUS", PMC_PSS_BIT_USH_SUS}, 15280a7581fSIrina Tirdea {"USH_VCCS", PMC_PSS_BIT_USH_VCCS}, 15380a7581fSIrina Tirdea {"USH_VCCA", PMC_PSS_BIT_USH_VCCA}, 15480a7581fSIrina Tirdea {"OTG_CTRL", PMC_PSS_BIT_OTG_CTRL}, 15580a7581fSIrina Tirdea {"OTG_VCCS", PMC_PSS_BIT_OTG_VCCS}, 15680a7581fSIrina Tirdea {"OTG_VCCA_CLK", PMC_PSS_BIT_OTG_VCCA_CLK}, 15780a7581fSIrina Tirdea {"OTG_VCCA", PMC_PSS_BIT_OTG_VCCA}, 15880a7581fSIrina Tirdea {"USB", PMC_PSS_BIT_USB}, 15980a7581fSIrina Tirdea {"USB_SUS", PMC_PSS_BIT_USB_SUS}, 16080a7581fSIrina Tirdea {}, 16180a7581fSIrina Tirdea }; 16280a7581fSIrina Tirdea 16380a7581fSIrina Tirdea static const struct pmc_bit_map cht_pss_map[] = { 16480a7581fSIrina Tirdea {"SATA", PMC_PSS_BIT_SATA}, 16580a7581fSIrina Tirdea {"HDA", PMC_PSS_BIT_HDA}, 16680a7581fSIrina Tirdea {"SEC", PMC_PSS_BIT_SEC}, 16780a7581fSIrina Tirdea {"PCIE", PMC_PSS_BIT_PCIE}, 16880a7581fSIrina Tirdea {"LPSS", PMC_PSS_BIT_LPSS}, 16980a7581fSIrina Tirdea {"LPE", PMC_PSS_BIT_LPE}, 17080a7581fSIrina Tirdea {"UFS", PMC_PSS_BIT_CHT_UFS}, 17180a7581fSIrina Tirdea {"UXD", PMC_PSS_BIT_CHT_UXD}, 17280a7581fSIrina Tirdea {"UXD_FD", PMC_PSS_BIT_CHT_UXD_FD}, 17380a7581fSIrina Tirdea {"UX_ENG", PMC_PSS_BIT_CHT_UX_ENG}, 17480a7581fSIrina Tirdea {"USB_SUS", PMC_PSS_BIT_CHT_USB_SUS}, 17580a7581fSIrina Tirdea {"GMM", PMC_PSS_BIT_CHT_GMM}, 17680a7581fSIrina Tirdea {"ISH", PMC_PSS_BIT_CHT_ISH}, 17780a7581fSIrina Tirdea {"DFX_MASTER", PMC_PSS_BIT_CHT_DFX_MASTER}, 17880a7581fSIrina Tirdea {"DFX_CLUSTER1", PMC_PSS_BIT_CHT_DFX_CLUSTER1}, 17980a7581fSIrina Tirdea {"DFX_CLUSTER2", PMC_PSS_BIT_CHT_DFX_CLUSTER2}, 18080a7581fSIrina Tirdea {"DFX_CLUSTER3", PMC_PSS_BIT_CHT_DFX_CLUSTER3}, 18180a7581fSIrina Tirdea {"DFX_CLUSTER4", PMC_PSS_BIT_CHT_DFX_CLUSTER4}, 18280a7581fSIrina Tirdea {"DFX_CLUSTER5", PMC_PSS_BIT_CHT_DFX_CLUSTER5}, 18380a7581fSIrina Tirdea {}, 18480a7581fSIrina Tirdea }; 18580a7581fSIrina Tirdea 18680a7581fSIrina Tirdea static const struct pmc_reg_map byt_reg_map = { 18780a7581fSIrina Tirdea .d3_sts_0 = d3_sts_0_map, 18880a7581fSIrina Tirdea .d3_sts_1 = byt_d3_sts_1_map, 18980a7581fSIrina Tirdea .func_dis = d3_sts_0_map, 19080a7581fSIrina Tirdea .func_dis_2 = byt_d3_sts_1_map, 19180a7581fSIrina Tirdea .pss = byt_pss_map, 19280a7581fSIrina Tirdea }; 19380a7581fSIrina Tirdea 19480a7581fSIrina Tirdea static const struct pmc_reg_map cht_reg_map = { 19580a7581fSIrina Tirdea .d3_sts_0 = d3_sts_0_map, 19680a7581fSIrina Tirdea .d3_sts_1 = cht_d3_sts_1_map, 19780a7581fSIrina Tirdea .func_dis = d3_sts_0_map, 19880a7581fSIrina Tirdea .func_dis_2 = cht_func_dis_2_map, 19980a7581fSIrina Tirdea .pss = cht_pss_map, 20080a7581fSIrina Tirdea }; 20180a7581fSIrina Tirdea 202282a4e4cSIrina Tirdea static const struct pmc_data byt_data = { 203282a4e4cSIrina Tirdea .map = &byt_reg_map, 204282a4e4cSIrina Tirdea .clks = byt_clks, 205282a4e4cSIrina Tirdea }; 206282a4e4cSIrina Tirdea 207282a4e4cSIrina Tirdea static const struct pmc_data cht_data = { 208282a4e4cSIrina Tirdea .map = &cht_reg_map, 209282a4e4cSIrina Tirdea .clks = cht_clks, 210282a4e4cSIrina Tirdea }; 211282a4e4cSIrina Tirdea 21280a7581fSIrina Tirdea static inline u32 pmc_reg_read(struct pmc_dev *pmc, int reg_offset) 21380a7581fSIrina Tirdea { 21480a7581fSIrina Tirdea return readl(pmc->regmap + reg_offset); 21580a7581fSIrina Tirdea } 21680a7581fSIrina Tirdea 21780a7581fSIrina Tirdea static inline void pmc_reg_write(struct pmc_dev *pmc, int reg_offset, u32 val) 21880a7581fSIrina Tirdea { 21980a7581fSIrina Tirdea writel(val, pmc->regmap + reg_offset); 22080a7581fSIrina Tirdea } 22180a7581fSIrina Tirdea 22280a7581fSIrina Tirdea int pmc_atom_read(int offset, u32 *value) 22380a7581fSIrina Tirdea { 22480a7581fSIrina Tirdea struct pmc_dev *pmc = &pmc_device; 22580a7581fSIrina Tirdea 22680a7581fSIrina Tirdea if (!pmc->init) 22780a7581fSIrina Tirdea return -ENODEV; 22880a7581fSIrina Tirdea 22980a7581fSIrina Tirdea *value = pmc_reg_read(pmc, offset); 23080a7581fSIrina Tirdea return 0; 23180a7581fSIrina Tirdea } 23280a7581fSIrina Tirdea EXPORT_SYMBOL_GPL(pmc_atom_read); 23380a7581fSIrina Tirdea 23480a7581fSIrina Tirdea int pmc_atom_write(int offset, u32 value) 23580a7581fSIrina Tirdea { 23680a7581fSIrina Tirdea struct pmc_dev *pmc = &pmc_device; 23780a7581fSIrina Tirdea 23880a7581fSIrina Tirdea if (!pmc->init) 23980a7581fSIrina Tirdea return -ENODEV; 24080a7581fSIrina Tirdea 24180a7581fSIrina Tirdea pmc_reg_write(pmc, offset, value); 24280a7581fSIrina Tirdea return 0; 24380a7581fSIrina Tirdea } 24480a7581fSIrina Tirdea EXPORT_SYMBOL_GPL(pmc_atom_write); 24580a7581fSIrina Tirdea 24680a7581fSIrina Tirdea static void pmc_power_off(void) 24780a7581fSIrina Tirdea { 24880a7581fSIrina Tirdea u16 pm1_cnt_port; 24980a7581fSIrina Tirdea u32 pm1_cnt_value; 25080a7581fSIrina Tirdea 25180a7581fSIrina Tirdea pr_info("Preparing to enter system sleep state S5\n"); 25280a7581fSIrina Tirdea 25380a7581fSIrina Tirdea pm1_cnt_port = acpi_base_addr + PM1_CNT; 25480a7581fSIrina Tirdea 25580a7581fSIrina Tirdea pm1_cnt_value = inl(pm1_cnt_port); 25680a7581fSIrina Tirdea pm1_cnt_value &= SLEEP_TYPE_MASK; 25780a7581fSIrina Tirdea pm1_cnt_value |= SLEEP_TYPE_S5; 25880a7581fSIrina Tirdea pm1_cnt_value |= SLEEP_ENABLE; 25980a7581fSIrina Tirdea 26080a7581fSIrina Tirdea outl(pm1_cnt_value, pm1_cnt_port); 26180a7581fSIrina Tirdea } 26280a7581fSIrina Tirdea 26380a7581fSIrina Tirdea static void pmc_hw_reg_setup(struct pmc_dev *pmc) 26480a7581fSIrina Tirdea { 26580a7581fSIrina Tirdea /* 26680a7581fSIrina Tirdea * Disable PMC S0IX_WAKE_EN events coming from: 26780a7581fSIrina Tirdea * - LPC clock run 26880a7581fSIrina Tirdea * - GPIO_SUS ored dedicated IRQs 26980a7581fSIrina Tirdea * - GPIO_SCORE ored dedicated IRQs 27080a7581fSIrina Tirdea * - GPIO_SUS shared IRQ 27180a7581fSIrina Tirdea * - GPIO_SCORE shared IRQ 27280a7581fSIrina Tirdea */ 27380a7581fSIrina Tirdea pmc_reg_write(pmc, PMC_S0IX_WAKE_EN, (u32)PMC_WAKE_EN_SETTING); 27480a7581fSIrina Tirdea } 27580a7581fSIrina Tirdea 27680a7581fSIrina Tirdea #ifdef CONFIG_DEBUG_FS 27780a7581fSIrina Tirdea static void pmc_dev_state_print(struct seq_file *s, int reg_index, 27880a7581fSIrina Tirdea u32 sts, const struct pmc_bit_map *sts_map, 27980a7581fSIrina Tirdea u32 fd, const struct pmc_bit_map *fd_map) 28080a7581fSIrina Tirdea { 28180a7581fSIrina Tirdea int offset = PMC_REG_BIT_WIDTH * reg_index; 28280a7581fSIrina Tirdea int index; 28380a7581fSIrina Tirdea 28480a7581fSIrina Tirdea for (index = 0; sts_map[index].name; index++) { 28580a7581fSIrina Tirdea seq_printf(s, "Dev: %-2d - %-32s\tState: %s [%s]\n", 28680a7581fSIrina Tirdea offset + index, sts_map[index].name, 28780a7581fSIrina Tirdea fd_map[index].bit_mask & fd ? "Disabled" : "Enabled ", 28880a7581fSIrina Tirdea sts_map[index].bit_mask & sts ? "D3" : "D0"); 28980a7581fSIrina Tirdea } 29080a7581fSIrina Tirdea } 29180a7581fSIrina Tirdea 29280a7581fSIrina Tirdea static int pmc_dev_state_show(struct seq_file *s, void *unused) 29380a7581fSIrina Tirdea { 29480a7581fSIrina Tirdea struct pmc_dev *pmc = s->private; 29580a7581fSIrina Tirdea const struct pmc_reg_map *m = pmc->map; 29680a7581fSIrina Tirdea u32 func_dis, func_dis_2; 29780a7581fSIrina Tirdea u32 d3_sts_0, d3_sts_1; 29880a7581fSIrina Tirdea 29980a7581fSIrina Tirdea func_dis = pmc_reg_read(pmc, PMC_FUNC_DIS); 30080a7581fSIrina Tirdea func_dis_2 = pmc_reg_read(pmc, PMC_FUNC_DIS_2); 30180a7581fSIrina Tirdea d3_sts_0 = pmc_reg_read(pmc, PMC_D3_STS_0); 30280a7581fSIrina Tirdea d3_sts_1 = pmc_reg_read(pmc, PMC_D3_STS_1); 30380a7581fSIrina Tirdea 30480a7581fSIrina Tirdea /* Low part */ 30580a7581fSIrina Tirdea pmc_dev_state_print(s, 0, d3_sts_0, m->d3_sts_0, func_dis, m->func_dis); 30680a7581fSIrina Tirdea 30780a7581fSIrina Tirdea /* High part */ 30880a7581fSIrina Tirdea pmc_dev_state_print(s, 1, d3_sts_1, m->d3_sts_1, func_dis_2, m->func_dis_2); 30980a7581fSIrina Tirdea 31080a7581fSIrina Tirdea return 0; 31180a7581fSIrina Tirdea } 31280a7581fSIrina Tirdea 3131ea74a56SAndy Shevchenko DEFINE_SHOW_ATTRIBUTE(pmc_dev_state); 31480a7581fSIrina Tirdea 31580a7581fSIrina Tirdea static int pmc_pss_state_show(struct seq_file *s, void *unused) 31680a7581fSIrina Tirdea { 31780a7581fSIrina Tirdea struct pmc_dev *pmc = s->private; 31880a7581fSIrina Tirdea const struct pmc_bit_map *map = pmc->map->pss; 31980a7581fSIrina Tirdea u32 pss = pmc_reg_read(pmc, PMC_PSS); 32080a7581fSIrina Tirdea int index; 32180a7581fSIrina Tirdea 32280a7581fSIrina Tirdea for (index = 0; map[index].name; index++) { 32380a7581fSIrina Tirdea seq_printf(s, "Island: %-2d - %-32s\tState: %s\n", 32480a7581fSIrina Tirdea index, map[index].name, 32580a7581fSIrina Tirdea map[index].bit_mask & pss ? "Off" : "On"); 32680a7581fSIrina Tirdea } 32780a7581fSIrina Tirdea return 0; 32880a7581fSIrina Tirdea } 32980a7581fSIrina Tirdea 3301ea74a56SAndy Shevchenko DEFINE_SHOW_ATTRIBUTE(pmc_pss_state); 33180a7581fSIrina Tirdea 33280a7581fSIrina Tirdea static int pmc_sleep_tmr_show(struct seq_file *s, void *unused) 33380a7581fSIrina Tirdea { 33480a7581fSIrina Tirdea struct pmc_dev *pmc = s->private; 33580a7581fSIrina Tirdea u64 s0ir_tmr, s0i1_tmr, s0i2_tmr, s0i3_tmr, s0_tmr; 33680a7581fSIrina Tirdea 33780a7581fSIrina Tirdea s0ir_tmr = (u64)pmc_reg_read(pmc, PMC_S0IR_TMR) << PMC_TMR_SHIFT; 33880a7581fSIrina Tirdea s0i1_tmr = (u64)pmc_reg_read(pmc, PMC_S0I1_TMR) << PMC_TMR_SHIFT; 33980a7581fSIrina Tirdea s0i2_tmr = (u64)pmc_reg_read(pmc, PMC_S0I2_TMR) << PMC_TMR_SHIFT; 34080a7581fSIrina Tirdea s0i3_tmr = (u64)pmc_reg_read(pmc, PMC_S0I3_TMR) << PMC_TMR_SHIFT; 34180a7581fSIrina Tirdea s0_tmr = (u64)pmc_reg_read(pmc, PMC_S0_TMR) << PMC_TMR_SHIFT; 34280a7581fSIrina Tirdea 34380a7581fSIrina Tirdea seq_printf(s, "S0IR Residency:\t%lldus\n", s0ir_tmr); 34480a7581fSIrina Tirdea seq_printf(s, "S0I1 Residency:\t%lldus\n", s0i1_tmr); 34580a7581fSIrina Tirdea seq_printf(s, "S0I2 Residency:\t%lldus\n", s0i2_tmr); 34680a7581fSIrina Tirdea seq_printf(s, "S0I3 Residency:\t%lldus\n", s0i3_tmr); 34780a7581fSIrina Tirdea seq_printf(s, "S0 Residency:\t%lldus\n", s0_tmr); 34880a7581fSIrina Tirdea return 0; 34980a7581fSIrina Tirdea } 35080a7581fSIrina Tirdea 3511ea74a56SAndy Shevchenko DEFINE_SHOW_ATTRIBUTE(pmc_sleep_tmr); 35280a7581fSIrina Tirdea 35380a7581fSIrina Tirdea static void pmc_dbgfs_unregister(struct pmc_dev *pmc) 35480a7581fSIrina Tirdea { 35580a7581fSIrina Tirdea debugfs_remove_recursive(pmc->dbgfs_dir); 35680a7581fSIrina Tirdea } 35780a7581fSIrina Tirdea 35880a7581fSIrina Tirdea static int pmc_dbgfs_register(struct pmc_dev *pmc) 35980a7581fSIrina Tirdea { 36080a7581fSIrina Tirdea struct dentry *dir, *f; 36180a7581fSIrina Tirdea 36280a7581fSIrina Tirdea dir = debugfs_create_dir("pmc_atom", NULL); 36380a7581fSIrina Tirdea if (!dir) 36480a7581fSIrina Tirdea return -ENOMEM; 36580a7581fSIrina Tirdea 36680a7581fSIrina Tirdea pmc->dbgfs_dir = dir; 36780a7581fSIrina Tirdea 36880a7581fSIrina Tirdea f = debugfs_create_file("dev_state", S_IFREG | S_IRUGO, 3691ea74a56SAndy Shevchenko dir, pmc, &pmc_dev_state_fops); 37080a7581fSIrina Tirdea if (!f) 37180a7581fSIrina Tirdea goto err; 37280a7581fSIrina Tirdea 37380a7581fSIrina Tirdea f = debugfs_create_file("pss_state", S_IFREG | S_IRUGO, 3741ea74a56SAndy Shevchenko dir, pmc, &pmc_pss_state_fops); 37580a7581fSIrina Tirdea if (!f) 37680a7581fSIrina Tirdea goto err; 37780a7581fSIrina Tirdea 37880a7581fSIrina Tirdea f = debugfs_create_file("sleep_state", S_IFREG | S_IRUGO, 3791ea74a56SAndy Shevchenko dir, pmc, &pmc_sleep_tmr_fops); 38080a7581fSIrina Tirdea if (!f) 38180a7581fSIrina Tirdea goto err; 38280a7581fSIrina Tirdea 38380a7581fSIrina Tirdea return 0; 38480a7581fSIrina Tirdea err: 38580a7581fSIrina Tirdea pmc_dbgfs_unregister(pmc); 38680a7581fSIrina Tirdea return -ENODEV; 38780a7581fSIrina Tirdea } 38880a7581fSIrina Tirdea #else 38980a7581fSIrina Tirdea static int pmc_dbgfs_register(struct pmc_dev *pmc) 39080a7581fSIrina Tirdea { 39180a7581fSIrina Tirdea return 0; 39280a7581fSIrina Tirdea } 39380a7581fSIrina Tirdea #endif /* CONFIG_DEBUG_FS */ 39480a7581fSIrina Tirdea 3957c2e0713SDavid Müller /* 3967c2e0713SDavid Müller * Some systems need one or more of their pmc_plt_clks to be 3977c2e0713SDavid Müller * marked as critical. 3987c2e0713SDavid Müller */ 399b995dccaSStephen Boyd static const struct dmi_system_id critclk_systems[] = { 4007c2e0713SDavid Müller { 4017c2e0713SDavid Müller .ident = "MPL CEC1x", 4027c2e0713SDavid Müller .matches = { 4037c2e0713SDavid Müller DMI_MATCH(DMI_SYS_VENDOR, "MPL AG"), 4047c2e0713SDavid Müller DMI_MATCH(DMI_PRODUCT_NAME, "CEC10 Family"), 4057c2e0713SDavid Müller }, 4067c2e0713SDavid Müller }, 4077c2e0713SDavid Müller { /*sentinel*/ } 4087c2e0713SDavid Müller }; 4097c2e0713SDavid Müller 410282a4e4cSIrina Tirdea static int pmc_setup_clks(struct pci_dev *pdev, void __iomem *pmc_regmap, 411282a4e4cSIrina Tirdea const struct pmc_data *pmc_data) 412282a4e4cSIrina Tirdea { 413282a4e4cSIrina Tirdea struct platform_device *clkdev; 414282a4e4cSIrina Tirdea struct pmc_clk_data *clk_data; 4157c2e0713SDavid Müller const struct dmi_system_id *d = dmi_first_match(critclk_systems); 416282a4e4cSIrina Tirdea 417282a4e4cSIrina Tirdea clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL); 418282a4e4cSIrina Tirdea if (!clk_data) 419282a4e4cSIrina Tirdea return -ENOMEM; 420282a4e4cSIrina Tirdea 421282a4e4cSIrina Tirdea clk_data->base = pmc_regmap; /* offset is added by client */ 422282a4e4cSIrina Tirdea clk_data->clks = pmc_data->clks; 4237c2e0713SDavid Müller if (d) { 4247c2e0713SDavid Müller clk_data->critical = true; 4257c2e0713SDavid Müller pr_info("%s critclks quirk enabled\n", d->ident); 4267c2e0713SDavid Müller } 427282a4e4cSIrina Tirdea 428282a4e4cSIrina Tirdea clkdev = platform_device_register_data(&pdev->dev, "clk-pmc-atom", 429282a4e4cSIrina Tirdea PLATFORM_DEVID_NONE, 430282a4e4cSIrina Tirdea clk_data, sizeof(*clk_data)); 431282a4e4cSIrina Tirdea if (IS_ERR(clkdev)) { 432282a4e4cSIrina Tirdea kfree(clk_data); 433282a4e4cSIrina Tirdea return PTR_ERR(clkdev); 434282a4e4cSIrina Tirdea } 435282a4e4cSIrina Tirdea 436282a4e4cSIrina Tirdea kfree(clk_data); 437282a4e4cSIrina Tirdea 438282a4e4cSIrina Tirdea return 0; 439282a4e4cSIrina Tirdea } 440282a4e4cSIrina Tirdea 44180a7581fSIrina Tirdea static int pmc_setup_dev(struct pci_dev *pdev, const struct pci_device_id *ent) 44280a7581fSIrina Tirdea { 44380a7581fSIrina Tirdea struct pmc_dev *pmc = &pmc_device; 444282a4e4cSIrina Tirdea const struct pmc_data *data = (struct pmc_data *)ent->driver_data; 445282a4e4cSIrina Tirdea const struct pmc_reg_map *map = data->map; 44680a7581fSIrina Tirdea int ret; 44780a7581fSIrina Tirdea 44880a7581fSIrina Tirdea /* Obtain ACPI base address */ 44980a7581fSIrina Tirdea pci_read_config_dword(pdev, ACPI_BASE_ADDR_OFFSET, &acpi_base_addr); 45080a7581fSIrina Tirdea acpi_base_addr &= ACPI_BASE_ADDR_MASK; 45180a7581fSIrina Tirdea 45280a7581fSIrina Tirdea /* Install power off function */ 45380a7581fSIrina Tirdea if (acpi_base_addr != 0 && pm_power_off == NULL) 45480a7581fSIrina Tirdea pm_power_off = pmc_power_off; 45580a7581fSIrina Tirdea 45680a7581fSIrina Tirdea pci_read_config_dword(pdev, PMC_BASE_ADDR_OFFSET, &pmc->base_addr); 45780a7581fSIrina Tirdea pmc->base_addr &= PMC_BASE_ADDR_MASK; 45880a7581fSIrina Tirdea 45980a7581fSIrina Tirdea pmc->regmap = ioremap_nocache(pmc->base_addr, PMC_MMIO_REG_LEN); 46080a7581fSIrina Tirdea if (!pmc->regmap) { 46180a7581fSIrina Tirdea dev_err(&pdev->dev, "error: ioremap failed\n"); 46280a7581fSIrina Tirdea return -ENOMEM; 46380a7581fSIrina Tirdea } 46480a7581fSIrina Tirdea 46580a7581fSIrina Tirdea pmc->map = map; 46680a7581fSIrina Tirdea 46780a7581fSIrina Tirdea /* PMC hardware registers setup */ 46880a7581fSIrina Tirdea pmc_hw_reg_setup(pmc); 46980a7581fSIrina Tirdea 47080a7581fSIrina Tirdea ret = pmc_dbgfs_register(pmc); 47180a7581fSIrina Tirdea if (ret) 47280a7581fSIrina Tirdea dev_warn(&pdev->dev, "debugfs register failed\n"); 47380a7581fSIrina Tirdea 474282a4e4cSIrina Tirdea /* Register platform clocks - PMC_PLT_CLK [0..5] */ 475282a4e4cSIrina Tirdea ret = pmc_setup_clks(pdev, pmc->regmap, data); 476282a4e4cSIrina Tirdea if (ret) 477282a4e4cSIrina Tirdea dev_warn(&pdev->dev, "platform clocks register failed: %d\n", 478282a4e4cSIrina Tirdea ret); 479282a4e4cSIrina Tirdea 48080a7581fSIrina Tirdea pmc->init = true; 48180a7581fSIrina Tirdea return ret; 48280a7581fSIrina Tirdea } 48380a7581fSIrina Tirdea 48480a7581fSIrina Tirdea /* 48580a7581fSIrina Tirdea * Data for PCI driver interface 48680a7581fSIrina Tirdea * 48780a7581fSIrina Tirdea * used by pci_match_id() call below. 48880a7581fSIrina Tirdea */ 48980a7581fSIrina Tirdea static const struct pci_device_id pmc_pci_ids[] = { 490282a4e4cSIrina Tirdea { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_VLV_PMC), (kernel_ulong_t)&byt_data }, 491282a4e4cSIrina Tirdea { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_CHT_PMC), (kernel_ulong_t)&cht_data }, 49280a7581fSIrina Tirdea { 0, }, 49380a7581fSIrina Tirdea }; 49480a7581fSIrina Tirdea 49580a7581fSIrina Tirdea static int __init pmc_atom_init(void) 49680a7581fSIrina Tirdea { 49780a7581fSIrina Tirdea struct pci_dev *pdev = NULL; 49880a7581fSIrina Tirdea const struct pci_device_id *ent; 49980a7581fSIrina Tirdea 50080a7581fSIrina Tirdea /* We look for our device - PCU PMC 50180a7581fSIrina Tirdea * we assume that there is max. one device. 50280a7581fSIrina Tirdea * 50380a7581fSIrina Tirdea * We can't use plain pci_driver mechanism, 50480a7581fSIrina Tirdea * as the device is really a multiple function device, 50580a7581fSIrina Tirdea * main driver that binds to the pci_device is lpc_ich 50680a7581fSIrina Tirdea * and have to find & bind to the device this way. 50780a7581fSIrina Tirdea */ 50880a7581fSIrina Tirdea for_each_pci_dev(pdev) { 50980a7581fSIrina Tirdea ent = pci_match_id(pmc_pci_ids, pdev); 51080a7581fSIrina Tirdea if (ent) 51180a7581fSIrina Tirdea return pmc_setup_dev(pdev, ent); 51280a7581fSIrina Tirdea } 51380a7581fSIrina Tirdea /* Device not found. */ 51480a7581fSIrina Tirdea return -ENODEV; 51580a7581fSIrina Tirdea } 51680a7581fSIrina Tirdea 51780a7581fSIrina Tirdea device_initcall(pmc_atom_init); 51880a7581fSIrina Tirdea 51980a7581fSIrina Tirdea /* 52080a7581fSIrina Tirdea MODULE_AUTHOR("Aubrey Li <aubrey.li@linux.intel.com>"); 52180a7581fSIrina Tirdea MODULE_DESCRIPTION("Intel Atom SOC Power Management Controller Interface"); 52280a7581fSIrina Tirdea MODULE_LICENSE("GPL v2"); 52380a7581fSIrina Tirdea */ 524