#include <linux/init.h>
#include <linux/io.h>
#include <linux/pci.h>
+#include <linux/delay.h>
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
static struct pmc_dev pmc;
+static const struct pmc_bit_map spt_mphy_map[] = {
+ {"MPHY CORE LANE 0", SPT_PMC_BIT_MPHY_LANE0},
+ {"MPHY CORE LANE 1", SPT_PMC_BIT_MPHY_LANE1},
+ {"MPHY CORE LANE 2", SPT_PMC_BIT_MPHY_LANE2},
+ {"MPHY CORE LANE 3", SPT_PMC_BIT_MPHY_LANE3},
+ {"MPHY CORE LANE 4", SPT_PMC_BIT_MPHY_LANE4},
+ {"MPHY CORE LANE 5", SPT_PMC_BIT_MPHY_LANE5},
+ {"MPHY CORE LANE 6", SPT_PMC_BIT_MPHY_LANE6},
+ {"MPHY CORE LANE 7", SPT_PMC_BIT_MPHY_LANE7},
+ {"MPHY CORE LANE 8", SPT_PMC_BIT_MPHY_LANE8},
+ {"MPHY CORE LANE 9", SPT_PMC_BIT_MPHY_LANE9},
+ {"MPHY CORE LANE 10", SPT_PMC_BIT_MPHY_LANE10},
+ {"MPHY CORE LANE 11", SPT_PMC_BIT_MPHY_LANE11},
+ {"MPHY CORE LANE 12", SPT_PMC_BIT_MPHY_LANE12},
+ {"MPHY CORE LANE 13", SPT_PMC_BIT_MPHY_LANE13},
+ {"MPHY CORE LANE 14", SPT_PMC_BIT_MPHY_LANE14},
+ {"MPHY CORE LANE 15", SPT_PMC_BIT_MPHY_LANE15},
+ {},
+};
+
static const struct pmc_bit_map spt_pfear_map[] = {
{"PMC", SPT_PMC_BIT_PMC},
{"OPI-DMI", SPT_PMC_BIT_OPI},
static const struct pmc_reg_map spt_reg_map = {
.pfear_sts = spt_pfear_map,
+ .mphy_sts = spt_mphy_map,
};
static const struct pci_device_id pmc_pci_ids[] = {
return readl(pmcdev->regbase + reg_offset);
}
+static inline void pmc_core_reg_write(struct pmc_dev *pmcdev, int
+ reg_offset, u32 val)
+{
+ writel(val, pmcdev->regbase + reg_offset);
+}
+
static inline u32 pmc_core_adjust_slp_s0_step(u32 value)
{
return value * SPT_PMC_SLP_S0_RES_COUNTER_STEP;
DEFINE_DEBUGFS_ATTRIBUTE(pmc_core_dev_state, pmc_core_dev_state_get, NULL, "%llu\n");
+static int pmc_core_check_read_lock_bit(void)
+{
+ struct pmc_dev *pmcdev = &pmc;
+ u32 value;
+
+ value = pmc_core_reg_read(pmcdev, SPT_PMC_PM_CFG_OFFSET);
+ return test_bit(SPT_PMC_READ_DISABLE_BIT,
+ (unsigned long *)&value);
+}
+
#if IS_ENABLED(CONFIG_DEBUG_FS)
static void pmc_core_display_map(struct seq_file *s, int index,
u8 pf_reg, const struct pmc_bit_map *pf_map)
.release = single_release,
};
+/* This function should return link status, 0 means ready */
+static int pmc_core_mtpmc_link_status(void)
+{
+ struct pmc_dev *pmcdev = &pmc;
+ u32 value;
+
+ value = pmc_core_reg_read(pmcdev, SPT_PMC_PM_STS_OFFSET);
+ return test_bit(SPT_PMC_MSG_FULL_STS_BIT,
+ (unsigned long *)&value);
+}
+
+static int pmc_core_send_msg(u32 *addr_xram)
+{
+ struct pmc_dev *pmcdev = &pmc;
+ u32 dest;
+ int timeout;
+
+ for (timeout = NUM_RETRIES; timeout > 0; timeout--) {
+ if (pmc_core_mtpmc_link_status() == 0)
+ break;
+ msleep(5);
+ }
+
+ if (timeout <= 0 && pmc_core_mtpmc_link_status())
+ return -EBUSY;
+
+ dest = (*addr_xram & MTPMC_MASK) | (1U << 1);
+ pmc_core_reg_write(pmcdev, SPT_PMC_MTPMC_OFFSET, dest);
+ return 0;
+}
+
+static int pmc_core_mphy_pg_sts_show(struct seq_file *s, void *unused)
+{
+ struct pmc_dev *pmcdev = s->private;
+ const struct pmc_bit_map *map = pmcdev->map->mphy_sts;
+ u32 mphy_core_reg_low, mphy_core_reg_high;
+ u32 val_low, val_high;
+ int index, err = 0;
+
+ if (pmcdev->pmc_xram_read_bit) {
+ seq_puts(s, "Access denied: please disable PMC_READ_DISABLE setting in BIOS.");
+ return 0;
+ }
+
+ mphy_core_reg_low = (SPT_PMC_MPHY_CORE_STS_0 << 16);
+ mphy_core_reg_high = (SPT_PMC_MPHY_CORE_STS_1 << 16);
+
+ mutex_lock(&pmcdev->lock);
+
+ if (pmc_core_send_msg(&mphy_core_reg_low) != 0) {
+ err = -EBUSY;
+ goto out_unlock;
+ }
+
+ msleep(10);
+ val_low = pmc_core_reg_read(pmcdev, SPT_PMC_MFPMC_OFFSET);
+
+ if (pmc_core_send_msg(&mphy_core_reg_high) != 0) {
+ err = -EBUSY;
+ goto out_unlock;
+ }
+
+ msleep(10);
+ val_high = pmc_core_reg_read(pmcdev, SPT_PMC_MFPMC_OFFSET);
+
+ for (index = 0; map[index].name && index < 8; index++) {
+ seq_printf(s, "%-32s\tState: %s\n",
+ map[index].name,
+ map[index].bit_mask & val_low ? "Not power gated" :
+ "Power gated");
+ }
+
+ for (index = 8; map[index].name; index++) {
+ seq_printf(s, "%-32s\tState: %s\n",
+ map[index].name,
+ map[index].bit_mask & val_high ? "Not power gated" :
+ "Power gated");
+ }
+
+out_unlock:
+ mutex_unlock(&pmcdev->lock);
+ return err;
+}
+
+static int pmc_core_mphy_pg_sts_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pmc_core_mphy_pg_sts_show, inode->i_private);
+}
+
+static const struct file_operations pmc_core_mphy_pg_ops = {
+ .open = pmc_core_mphy_pg_sts_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static void pmc_core_dbgfs_unregister(struct pmc_dev *pmcdev)
{
debugfs_remove_recursive(pmcdev->dbgfs_dir);
if (!file)
goto err;
+ file = debugfs_create_file("mphy_core_lanes_power_gating_status",
+ S_IFREG | S_IRUGO, dir, pmcdev,
+ &pmc_core_mphy_pg_ops);
+ if (!file)
+ goto err;
+
return 0;
err:
return -ENOMEM;
}
+ mutex_init(&pmcdev->lock);
+ pmcdev->pmc_xram_read_bit = pmc_core_check_read_lock_bit();
+ pmcdev->map = map;
+
err = pmc_core_dbgfs_register(pmcdev);
if (err < 0)
dev_warn(&dev->dev, "PMC Core: debugfs register failed.\n");
- pmcdev->map = map;
pmc.has_slp_s0_res = true;
return 0;
}
#define SPT_PMC_BASE_ADDR_OFFSET 0x48
#define SPT_PMC_SLP_S0_RES_COUNTER_OFFSET 0x13c
+#define SPT_PMC_PM_CFG_OFFSET 0x18
+#define SPT_PMC_PM_STS_OFFSET 0x1c
+#define SPT_PMC_MTPMC_OFFSET 0x20
+#define SPT_PMC_MFPMC_OFFSET 0x38
+#define SPT_PMC_MPHY_CORE_STS_0 0x1143
+#define SPT_PMC_MPHY_CORE_STS_1 0x1142
#define SPT_PMC_MMIO_REG_LEN 0x1000
#define SPT_PMC_SLP_S0_RES_COUNTER_STEP 0x64
#define PMC_BASE_ADDR_MASK ~(SPT_PMC_MMIO_REG_LEN - 1)
+#define MTPMC_MASK 0xffff0000
#define NUM_ENTRIES 5
+#define SPT_PMC_READ_DISABLE_BIT 0x16
+#define SPT_PMC_MSG_FULL_STS_BIT 0x18
+#define NUM_RETRIES 100
/* Sunrise Point: PGD PFET Enable Ack Status Registers */
enum ppfear_regs {
#define SPT_PMC_BIT_CSME_RTC BIT(6)
#define SPT_PMC_BIT_CSME_PSF BIT(7)
+#define SPT_PMC_BIT_MPHY_LANE0 BIT(0)
+#define SPT_PMC_BIT_MPHY_LANE1 BIT(1)
+#define SPT_PMC_BIT_MPHY_LANE2 BIT(2)
+#define SPT_PMC_BIT_MPHY_LANE3 BIT(3)
+#define SPT_PMC_BIT_MPHY_LANE4 BIT(4)
+#define SPT_PMC_BIT_MPHY_LANE5 BIT(5)
+#define SPT_PMC_BIT_MPHY_LANE6 BIT(6)
+#define SPT_PMC_BIT_MPHY_LANE7 BIT(7)
+
+#define SPT_PMC_BIT_MPHY_LANE8 BIT(0)
+#define SPT_PMC_BIT_MPHY_LANE9 BIT(1)
+#define SPT_PMC_BIT_MPHY_LANE10 BIT(2)
+#define SPT_PMC_BIT_MPHY_LANE11 BIT(3)
+#define SPT_PMC_BIT_MPHY_LANE12 BIT(4)
+#define SPT_PMC_BIT_MPHY_LANE13 BIT(5)
+#define SPT_PMC_BIT_MPHY_LANE14 BIT(6)
+#define SPT_PMC_BIT_MPHY_LANE15 BIT(7)
+
struct pmc_bit_map {
const char *name;
u32 bit_mask;
struct pmc_reg_map {
const struct pmc_bit_map *pfear_sts;
+ const struct pmc_bit_map *mphy_sts;
};
/**
struct dentry *dbgfs_dir;
#endif /* CONFIG_DEBUG_FS */
bool has_slp_s0_res;
+ int pmc_xram_read_bit;
+ struct mutex lock; /* generic mutex lock for PMC Core */
};
#endif /* PMC_CORE_H */
projects / platform / kernel / linux-rpi.git / commitdiff