arch/x86/platform/atom: Move pmc_atom to drivers/platform/x86
The pmc_atom driver does not contain any architecture specific
code. It only enables the SoC Power Management Controller driver
for BayTrail and CherryTrail platforms.
Move the pmc_atom driver from arch/x86/platform/atom to
drivers/platform/x86. Also clean-up and reorder include files by
alphabetical order in pmc_atom.h
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 5fe8be0..659b33f 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1077,3 +1077,7 @@
cables and fans on the wide range Mellanox IB and Ethernet systems.
endif # X86_PLATFORM_DEVICES
+
+config PMC_ATOM
+ def_bool y
+ depends on PCI
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index d4111f0..49ee7ef 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -74,5 +74,6 @@
intel_telemetry_pltdrv.o \
intel_telemetry_debugfs.o
obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core.o
+obj-$(CONFIG_PMC_ATOM) += pmc_atom.o
obj-$(CONFIG_MLX_PLATFORM) += mlx-platform.o
obj-$(CONFIG_MLX_CPLD_PLATFORM) += mlxcpld-hotplug.o
diff --git a/drivers/platform/x86/pmc_atom.c b/drivers/platform/x86/pmc_atom.c
new file mode 100644
index 0000000..e1dfb1b
--- /dev/null
+++ b/drivers/platform/x86/pmc_atom.c
@@ -0,0 +1,459 @@
+/*
+ * Intel Atom SOC Power Management Controller Driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/platform_data/x86/pmc_atom.h>
+#include <linux/pci.h>
+#include <linux/seq_file.h>
+
+struct pmc_bit_map {
+ const char *name;
+ u32 bit_mask;
+};
+
+struct pmc_reg_map {
+ const struct pmc_bit_map *d3_sts_0;
+ const struct pmc_bit_map *d3_sts_1;
+ const struct pmc_bit_map *func_dis;
+ const struct pmc_bit_map *func_dis_2;
+ const struct pmc_bit_map *pss;
+};
+
+struct pmc_dev {
+ u32 base_addr;
+ void __iomem *regmap;
+ const struct pmc_reg_map *map;
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *dbgfs_dir;
+#endif /* CONFIG_DEBUG_FS */
+ bool init;
+};
+
+static struct pmc_dev pmc_device;
+static u32 acpi_base_addr;
+
+static const struct pmc_bit_map d3_sts_0_map[] = {
+ {"LPSS1_F0_DMA", BIT_LPSS1_F0_DMA},
+ {"LPSS1_F1_PWM1", BIT_LPSS1_F1_PWM1},
+ {"LPSS1_F2_PWM2", BIT_LPSS1_F2_PWM2},
+ {"LPSS1_F3_HSUART1", BIT_LPSS1_F3_HSUART1},
+ {"LPSS1_F4_HSUART2", BIT_LPSS1_F4_HSUART2},
+ {"LPSS1_F5_SPI", BIT_LPSS1_F5_SPI},
+ {"LPSS1_F6_Reserved", BIT_LPSS1_F6_XXX},
+ {"LPSS1_F7_Reserved", BIT_LPSS1_F7_XXX},
+ {"SCC_EMMC", BIT_SCC_EMMC},
+ {"SCC_SDIO", BIT_SCC_SDIO},
+ {"SCC_SDCARD", BIT_SCC_SDCARD},
+ {"SCC_MIPI", BIT_SCC_MIPI},
+ {"HDA", BIT_HDA},
+ {"LPE", BIT_LPE},
+ {"OTG", BIT_OTG},
+ {"USH", BIT_USH},
+ {"GBE", BIT_GBE},
+ {"SATA", BIT_SATA},
+ {"USB_EHCI", BIT_USB_EHCI},
+ {"SEC", BIT_SEC},
+ {"PCIE_PORT0", BIT_PCIE_PORT0},
+ {"PCIE_PORT1", BIT_PCIE_PORT1},
+ {"PCIE_PORT2", BIT_PCIE_PORT2},
+ {"PCIE_PORT3", BIT_PCIE_PORT3},
+ {"LPSS2_F0_DMA", BIT_LPSS2_F0_DMA},
+ {"LPSS2_F1_I2C1", BIT_LPSS2_F1_I2C1},
+ {"LPSS2_F2_I2C2", BIT_LPSS2_F2_I2C2},
+ {"LPSS2_F3_I2C3", BIT_LPSS2_F3_I2C3},
+ {"LPSS2_F3_I2C4", BIT_LPSS2_F4_I2C4},
+ {"LPSS2_F5_I2C5", BIT_LPSS2_F5_I2C5},
+ {"LPSS2_F6_I2C6", BIT_LPSS2_F6_I2C6},
+ {"LPSS2_F7_I2C7", BIT_LPSS2_F7_I2C7},
+ {},
+};
+
+static struct pmc_bit_map byt_d3_sts_1_map[] = {
+ {"SMB", BIT_SMB},
+ {"OTG_SS_PHY", BIT_OTG_SS_PHY},
+ {"USH_SS_PHY", BIT_USH_SS_PHY},
+ {"DFX", BIT_DFX},
+ {},
+};
+
+static struct pmc_bit_map cht_d3_sts_1_map[] = {
+ {"SMB", BIT_SMB},
+ {"GMM", BIT_STS_GMM},
+ {"ISH", BIT_STS_ISH},
+ {},
+};
+
+static struct pmc_bit_map cht_func_dis_2_map[] = {
+ {"SMB", BIT_SMB},
+ {"GMM", BIT_FD_GMM},
+ {"ISH", BIT_FD_ISH},
+ {},
+};
+
+static const struct pmc_bit_map byt_pss_map[] = {
+ {"GBE", PMC_PSS_BIT_GBE},
+ {"SATA", PMC_PSS_BIT_SATA},
+ {"HDA", PMC_PSS_BIT_HDA},
+ {"SEC", PMC_PSS_BIT_SEC},
+ {"PCIE", PMC_PSS_BIT_PCIE},
+ {"LPSS", PMC_PSS_BIT_LPSS},
+ {"LPE", PMC_PSS_BIT_LPE},
+ {"DFX", PMC_PSS_BIT_DFX},
+ {"USH_CTRL", PMC_PSS_BIT_USH_CTRL},
+ {"USH_SUS", PMC_PSS_BIT_USH_SUS},
+ {"USH_VCCS", PMC_PSS_BIT_USH_VCCS},
+ {"USH_VCCA", PMC_PSS_BIT_USH_VCCA},
+ {"OTG_CTRL", PMC_PSS_BIT_OTG_CTRL},
+ {"OTG_VCCS", PMC_PSS_BIT_OTG_VCCS},
+ {"OTG_VCCA_CLK", PMC_PSS_BIT_OTG_VCCA_CLK},
+ {"OTG_VCCA", PMC_PSS_BIT_OTG_VCCA},
+ {"USB", PMC_PSS_BIT_USB},
+ {"USB_SUS", PMC_PSS_BIT_USB_SUS},
+ {},
+};
+
+static const struct pmc_bit_map cht_pss_map[] = {
+ {"SATA", PMC_PSS_BIT_SATA},
+ {"HDA", PMC_PSS_BIT_HDA},
+ {"SEC", PMC_PSS_BIT_SEC},
+ {"PCIE", PMC_PSS_BIT_PCIE},
+ {"LPSS", PMC_PSS_BIT_LPSS},
+ {"LPE", PMC_PSS_BIT_LPE},
+ {"UFS", PMC_PSS_BIT_CHT_UFS},
+ {"UXD", PMC_PSS_BIT_CHT_UXD},
+ {"UXD_FD", PMC_PSS_BIT_CHT_UXD_FD},
+ {"UX_ENG", PMC_PSS_BIT_CHT_UX_ENG},
+ {"USB_SUS", PMC_PSS_BIT_CHT_USB_SUS},
+ {"GMM", PMC_PSS_BIT_CHT_GMM},
+ {"ISH", PMC_PSS_BIT_CHT_ISH},
+ {"DFX_MASTER", PMC_PSS_BIT_CHT_DFX_MASTER},
+ {"DFX_CLUSTER1", PMC_PSS_BIT_CHT_DFX_CLUSTER1},
+ {"DFX_CLUSTER2", PMC_PSS_BIT_CHT_DFX_CLUSTER2},
+ {"DFX_CLUSTER3", PMC_PSS_BIT_CHT_DFX_CLUSTER3},
+ {"DFX_CLUSTER4", PMC_PSS_BIT_CHT_DFX_CLUSTER4},
+ {"DFX_CLUSTER5", PMC_PSS_BIT_CHT_DFX_CLUSTER5},
+ {},
+};
+
+static const struct pmc_reg_map byt_reg_map = {
+ .d3_sts_0 = d3_sts_0_map,
+ .d3_sts_1 = byt_d3_sts_1_map,
+ .func_dis = d3_sts_0_map,
+ .func_dis_2 = byt_d3_sts_1_map,
+ .pss = byt_pss_map,
+};
+
+static const struct pmc_reg_map cht_reg_map = {
+ .d3_sts_0 = d3_sts_0_map,
+ .d3_sts_1 = cht_d3_sts_1_map,
+ .func_dis = d3_sts_0_map,
+ .func_dis_2 = cht_func_dis_2_map,
+ .pss = cht_pss_map,
+};
+
+static inline u32 pmc_reg_read(struct pmc_dev *pmc, int reg_offset)
+{
+ return readl(pmc->regmap + reg_offset);
+}
+
+static inline void pmc_reg_write(struct pmc_dev *pmc, int reg_offset, u32 val)
+{
+ writel(val, pmc->regmap + reg_offset);
+}
+
+int pmc_atom_read(int offset, u32 *value)
+{
+ struct pmc_dev *pmc = &pmc_device;
+
+ if (!pmc->init)
+ return -ENODEV;
+
+ *value = pmc_reg_read(pmc, offset);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pmc_atom_read);
+
+int pmc_atom_write(int offset, u32 value)
+{
+ struct pmc_dev *pmc = &pmc_device;
+
+ if (!pmc->init)
+ return -ENODEV;
+
+ pmc_reg_write(pmc, offset, value);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pmc_atom_write);
+
+static void pmc_power_off(void)
+{
+ u16 pm1_cnt_port;
+ u32 pm1_cnt_value;
+
+ pr_info("Preparing to enter system sleep state S5\n");
+
+ pm1_cnt_port = acpi_base_addr + PM1_CNT;
+
+ pm1_cnt_value = inl(pm1_cnt_port);
+ pm1_cnt_value &= SLEEP_TYPE_MASK;
+ pm1_cnt_value |= SLEEP_TYPE_S5;
+ pm1_cnt_value |= SLEEP_ENABLE;
+
+ outl(pm1_cnt_value, pm1_cnt_port);
+}
+
+static void pmc_hw_reg_setup(struct pmc_dev *pmc)
+{
+ /*
+ * Disable PMC S0IX_WAKE_EN events coming from:
+ * - LPC clock run
+ * - GPIO_SUS ored dedicated IRQs
+ * - GPIO_SCORE ored dedicated IRQs
+ * - GPIO_SUS shared IRQ
+ * - GPIO_SCORE shared IRQ
+ */
+ pmc_reg_write(pmc, PMC_S0IX_WAKE_EN, (u32)PMC_WAKE_EN_SETTING);
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void pmc_dev_state_print(struct seq_file *s, int reg_index,
+ u32 sts, const struct pmc_bit_map *sts_map,
+ u32 fd, const struct pmc_bit_map *fd_map)
+{
+ int offset = PMC_REG_BIT_WIDTH * reg_index;
+ int index;
+
+ for (index = 0; sts_map[index].name; index++) {
+ seq_printf(s, "Dev: %-2d - %-32s\tState: %s [%s]\n",
+ offset + index, sts_map[index].name,
+ fd_map[index].bit_mask & fd ? "Disabled" : "Enabled ",
+ sts_map[index].bit_mask & sts ? "D3" : "D0");
+ }
+}
+
+static int pmc_dev_state_show(struct seq_file *s, void *unused)
+{
+ struct pmc_dev *pmc = s->private;
+ const struct pmc_reg_map *m = pmc->map;
+ u32 func_dis, func_dis_2;
+ u32 d3_sts_0, d3_sts_1;
+
+ func_dis = pmc_reg_read(pmc, PMC_FUNC_DIS);
+ func_dis_2 = pmc_reg_read(pmc, PMC_FUNC_DIS_2);
+ d3_sts_0 = pmc_reg_read(pmc, PMC_D3_STS_0);
+ d3_sts_1 = pmc_reg_read(pmc, PMC_D3_STS_1);
+
+ /* Low part */
+ pmc_dev_state_print(s, 0, d3_sts_0, m->d3_sts_0, func_dis, m->func_dis);
+
+ /* High part */
+ pmc_dev_state_print(s, 1, d3_sts_1, m->d3_sts_1, func_dis_2, m->func_dis_2);
+
+ return 0;
+}
+
+static int pmc_dev_state_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pmc_dev_state_show, inode->i_private);
+}
+
+static const struct file_operations pmc_dev_state_ops = {
+ .open = pmc_dev_state_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int pmc_pss_state_show(struct seq_file *s, void *unused)
+{
+ struct pmc_dev *pmc = s->private;
+ const struct pmc_bit_map *map = pmc->map->pss;
+ u32 pss = pmc_reg_read(pmc, PMC_PSS);
+ int index;
+
+ for (index = 0; map[index].name; index++) {
+ seq_printf(s, "Island: %-2d - %-32s\tState: %s\n",
+ index, map[index].name,
+ map[index].bit_mask & pss ? "Off" : "On");
+ }
+ return 0;
+}
+
+static int pmc_pss_state_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pmc_pss_state_show, inode->i_private);
+}
+
+static const struct file_operations pmc_pss_state_ops = {
+ .open = pmc_pss_state_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int pmc_sleep_tmr_show(struct seq_file *s, void *unused)
+{
+ struct pmc_dev *pmc = s->private;
+ u64 s0ir_tmr, s0i1_tmr, s0i2_tmr, s0i3_tmr, s0_tmr;
+
+ s0ir_tmr = (u64)pmc_reg_read(pmc, PMC_S0IR_TMR) << PMC_TMR_SHIFT;
+ s0i1_tmr = (u64)pmc_reg_read(pmc, PMC_S0I1_TMR) << PMC_TMR_SHIFT;
+ s0i2_tmr = (u64)pmc_reg_read(pmc, PMC_S0I2_TMR) << PMC_TMR_SHIFT;
+ s0i3_tmr = (u64)pmc_reg_read(pmc, PMC_S0I3_TMR) << PMC_TMR_SHIFT;
+ s0_tmr = (u64)pmc_reg_read(pmc, PMC_S0_TMR) << PMC_TMR_SHIFT;
+
+ seq_printf(s, "S0IR Residency:\t%lldus\n", s0ir_tmr);
+ seq_printf(s, "S0I1 Residency:\t%lldus\n", s0i1_tmr);
+ seq_printf(s, "S0I2 Residency:\t%lldus\n", s0i2_tmr);
+ seq_printf(s, "S0I3 Residency:\t%lldus\n", s0i3_tmr);
+ seq_printf(s, "S0 Residency:\t%lldus\n", s0_tmr);
+ return 0;
+}
+
+static int pmc_sleep_tmr_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pmc_sleep_tmr_show, inode->i_private);
+}
+
+static const struct file_operations pmc_sleep_tmr_ops = {
+ .open = pmc_sleep_tmr_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void pmc_dbgfs_unregister(struct pmc_dev *pmc)
+{
+ debugfs_remove_recursive(pmc->dbgfs_dir);
+}
+
+static int pmc_dbgfs_register(struct pmc_dev *pmc)
+{
+ struct dentry *dir, *f;
+
+ dir = debugfs_create_dir("pmc_atom", NULL);
+ if (!dir)
+ return -ENOMEM;
+
+ pmc->dbgfs_dir = dir;
+
+ f = debugfs_create_file("dev_state", S_IFREG | S_IRUGO,
+ dir, pmc, &pmc_dev_state_ops);
+ if (!f)
+ goto err;
+
+ f = debugfs_create_file("pss_state", S_IFREG | S_IRUGO,
+ dir, pmc, &pmc_pss_state_ops);
+ if (!f)
+ goto err;
+
+ f = debugfs_create_file("sleep_state", S_IFREG | S_IRUGO,
+ dir, pmc, &pmc_sleep_tmr_ops);
+ if (!f)
+ goto err;
+
+ return 0;
+err:
+ pmc_dbgfs_unregister(pmc);
+ return -ENODEV;
+}
+#else
+static int pmc_dbgfs_register(struct pmc_dev *pmc)
+{
+ return 0;
+}
+#endif /* CONFIG_DEBUG_FS */
+
+static int pmc_setup_dev(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ struct pmc_dev *pmc = &pmc_device;
+ const struct pmc_reg_map *map = (struct pmc_reg_map *)ent->driver_data;
+ int ret;
+
+ /* Obtain ACPI base address */
+ pci_read_config_dword(pdev, ACPI_BASE_ADDR_OFFSET, &acpi_base_addr);
+ acpi_base_addr &= ACPI_BASE_ADDR_MASK;
+
+ /* Install power off function */
+ if (acpi_base_addr != 0 && pm_power_off == NULL)
+ pm_power_off = pmc_power_off;
+
+ pci_read_config_dword(pdev, PMC_BASE_ADDR_OFFSET, &pmc->base_addr);
+ pmc->base_addr &= PMC_BASE_ADDR_MASK;
+
+ pmc->regmap = ioremap_nocache(pmc->base_addr, PMC_MMIO_REG_LEN);
+ if (!pmc->regmap) {
+ dev_err(&pdev->dev, "error: ioremap failed\n");
+ return -ENOMEM;
+ }
+
+ pmc->map = map;
+
+ /* PMC hardware registers setup */
+ pmc_hw_reg_setup(pmc);
+
+ ret = pmc_dbgfs_register(pmc);
+ if (ret)
+ dev_warn(&pdev->dev, "debugfs register failed\n");
+
+ pmc->init = true;
+ return ret;
+}
+
+/*
+ * Data for PCI driver interface
+ *
+ * used by pci_match_id() call below.
+ */
+static const struct pci_device_id pmc_pci_ids[] = {
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_VLV_PMC), (kernel_ulong_t)&byt_reg_map },
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_CHT_PMC), (kernel_ulong_t)&cht_reg_map },
+ { 0, },
+};
+
+static int __init pmc_atom_init(void)
+{
+ struct pci_dev *pdev = NULL;
+ const struct pci_device_id *ent;
+
+ /* We look for our device - PCU PMC
+ * we assume that there is max. one device.
+ *
+ * We can't use plain pci_driver mechanism,
+ * as the device is really a multiple function device,
+ * main driver that binds to the pci_device is lpc_ich
+ * and have to find & bind to the device this way.
+ */
+ for_each_pci_dev(pdev) {
+ ent = pci_match_id(pmc_pci_ids, pdev);
+ if (ent)
+ return pmc_setup_dev(pdev, ent);
+ }
+ /* Device not found. */
+ return -ENODEV;
+}
+
+device_initcall(pmc_atom_init);
+
+/*
+MODULE_AUTHOR("Aubrey Li <aubrey.li@linux.intel.com>");
+MODULE_DESCRIPTION("Intel Atom SOC Power Management Controller Interface");
+MODULE_LICENSE("GPL v2");
+*/