diff options
| -rw-r--r-- | drivers/spmi/spmi-pmic-arb.c | 153 |
1 files changed, 111 insertions, 42 deletions
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index be822f7a9ce6..aca282d45421 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -10,6 +10,7 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ +#include <linux/bitmap.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/interrupt.h> @@ -47,9 +48,9 @@ #define SPMI_MAPPING_BIT_IS_1_FLAG(X) (((X) >> 8) & 0x1) #define SPMI_MAPPING_BIT_IS_1_RESULT(X) (((X) >> 0) & 0xFF) -#define SPMI_MAPPING_TABLE_LEN 255 #define SPMI_MAPPING_TABLE_TREE_DEPTH 16 /* Maximum of 16-bits */ -#define PPID_TO_CHAN_TABLE_SZ BIT(12) /* PPID is 12bit chan is 1byte*/ +#define PMIC_ARB_MAX_PPID BIT(12) /* PPID is 12bit */ +#define PMIC_ARB_CHAN_VALID BIT(15) /* Ownership Table */ #define SPMI_OWNERSHIP_TABLE_REG(N) (0x0700 + (4 * (N))) @@ -85,9 +86,7 @@ enum pmic_arb_cmd_op_code { }; /* Maximum number of support PMIC peripherals */ -#define PMIC_ARB_MAX_PERIPHS 256 -#define PMIC_ARB_MAX_CHNL 128 -#define PMIC_ARB_PERIPH_ID_VALID (1 << 15) +#define PMIC_ARB_MAX_PERIPHS 512 #define PMIC_ARB_TIMEOUT_US 100 #define PMIC_ARB_MAX_TRANS_BYTES (8) @@ -125,18 +124,22 @@ struct spmi_pmic_arb_dev { void __iomem *wr_base; void __iomem *intr; void __iomem *cnfg; + void __iomem *core; + resource_size_t core_size; raw_spinlock_t lock; u8 channel; int irq; u8 ee; - u8 min_apid; - u8 max_apid; - u32 mapping_table[SPMI_MAPPING_TABLE_LEN]; + u16 min_apid; + u16 max_apid; + u32 *mapping_table; + DECLARE_BITMAP(mapping_table_valid, PMIC_ARB_MAX_PERIPHS); struct irq_domain *domain; struct spmi_controller *spmic; - u16 apid_to_ppid[256]; + u16 *apid_to_ppid; const struct pmic_arb_ver_ops *ver_ops; - u8 *ppid_to_chan; + u16 *ppid_to_chan; + u16 last_channel; }; /** @@ -158,7 +161,8 @@ struct spmi_pmic_arb_dev { */ struct pmic_arb_ver_ops { /* spmi commands (read_cmd, write_cmd, cmd) functionality */ - u32 (*offset)(struct spmi_pmic_arb_dev *dev, u8 sid, u16 addr); + int (*offset)(struct spmi_pmic_arb_dev *dev, u8 sid, u16 addr, + u32 *offset); u32 (*fmt_cmd)(u8 opc, u8 sid, u16 addr, u8 bc); int (*non_data_cmd)(struct spmi_controller *ctrl, u8 opc, u8 sid); /* Interrupts controller functionality (offset of PIC registers) */ @@ -212,7 +216,14 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl, struct spmi_pmic_arb_dev *dev = spmi_controller_get_drvdata(ctrl); u32 status = 0; u32 timeout = PMIC_ARB_TIMEOUT_US; - u32 offset = dev->ver_ops->offset(dev, sid, addr) + PMIC_ARB_STATUS; + u32 offset; + int rc; + + rc = dev->ver_ops->offset(dev, sid, addr, &offset); + if (rc) + return rc; + + offset += PMIC_ARB_STATUS; while (timeout--) { status = readl_relaxed(base + offset); @@ -257,7 +268,11 @@ pmic_arb_non_data_cmd_v1(struct spmi_controller *ctrl, u8 opc, u8 sid) unsigned long flags; u32 cmd; int rc; - u32 offset = pmic_arb->ver_ops->offset(pmic_arb, sid, 0); + u32 offset; + + rc = pmic_arb->ver_ops->offset(pmic_arb, sid, 0, &offset); + if (rc) + return rc; cmd = ((opc | 0x40) << 27) | ((sid & 0xf) << 20); @@ -297,7 +312,11 @@ static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, u8 bc = len - 1; u32 cmd; int rc; - u32 offset = pmic_arb->ver_ops->offset(pmic_arb, sid, addr); + u32 offset; + + rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr, &offset); + if (rc) + return rc; if (bc >= PMIC_ARB_MAX_TRANS_BYTES) { dev_err(&ctrl->dev, @@ -344,7 +363,11 @@ static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, u8 bc = len - 1; u32 cmd; int rc; - u32 offset = pmic_arb->ver_ops->offset(pmic_arb, sid, addr); + u32 offset; + + rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr, &offset); + if (rc) + return rc; if (bc >= PMIC_ARB_MAX_TRANS_BYTES) { dev_err(&ctrl->dev, @@ -614,6 +637,10 @@ static int search_mapping_table(struct spmi_pmic_arb_dev *pa, u32 data; for (i = 0; i < SPMI_MAPPING_TABLE_TREE_DEPTH; ++i) { + if (!test_and_set_bit(index, pa->mapping_table_valid)) + mapping_table[index] = readl_relaxed(pa->cnfg + + SPMI_MAPPING_TABLE_REG(index)); + data = mapping_table[index]; if (ppid & (1 << SPMI_MAPPING_BIT_INDEX(data))) { @@ -701,18 +728,61 @@ static int qpnpint_irq_domain_map(struct irq_domain *d, } /* v1 offset per ee */ -static u32 pmic_arb_offset_v1(struct spmi_pmic_arb_dev *pa, u8 sid, u16 addr) +static int +pmic_arb_offset_v1(struct spmi_pmic_arb_dev *pa, u8 sid, u16 addr, u32 *offset) { - return 0x800 + 0x80 * pa->channel; + *offset = 0x800 + 0x80 * pa->channel; + return 0; } +static u16 pmic_arb_find_chan(struct spmi_pmic_arb_dev *pa, u16 ppid) +{ + u32 regval, offset; + u16 chan; + u16 id; + + /* + * PMIC_ARB_REG_CHNL is a table in HW mapping channel to ppid. + * ppid_to_chan is an in-memory invert of that table. + */ + for (chan = pa->last_channel; ; chan++) { + offset = PMIC_ARB_REG_CHNL(chan); + if (offset >= pa->core_size) + break; + + regval = readl_relaxed(pa->core + offset); + if (!regval) + continue; + + id = (regval >> 8) & PMIC_ARB_PPID_MASK; + pa->ppid_to_chan[id] = chan | PMIC_ARB_CHAN_VALID; + if (id == ppid) { + chan |= PMIC_ARB_CHAN_VALID; + break; + } + } + pa->last_channel = chan & ~PMIC_ARB_CHAN_VALID; + + return chan; +} + + /* v2 offset per ppid (chan) and per ee */ -static u32 pmic_arb_offset_v2(struct spmi_pmic_arb_dev *pa, u8 sid, u16 addr) +static int +pmic_arb_offset_v2(struct spmi_pmic_arb_dev *pa, u8 sid, u16 addr, u32 *offset) { u16 ppid = (sid << 8) | (addr >> 8); - u8 chan = pa->ppid_to_chan[ppid]; + u16 chan; - return 0x1000 * pa->ee + 0x8000 * chan; + chan = pa->ppid_to_chan[ppid]; + if (!(chan & PMIC_ARB_CHAN_VALID)) + chan = pmic_arb_find_chan(pa, ppid); + if (!(chan & PMIC_ARB_CHAN_VALID)) + return -ENODEV; + chan &= ~PMIC_ARB_CHAN_VALID; + + *offset = 0x1000 * pa->ee + 0x8000 * chan; + return 0; } static u32 pmic_arb_fmt_cmd_v1(u8 opc, u8 sid, u16 addr, u8 bc) @@ -797,7 +867,7 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) struct resource *res; void __iomem *core; u32 channel, ee, hw_ver; - int err, i; + int err; bool is_v1; ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*pa)); @@ -808,6 +878,7 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) pa->spmic = ctrl; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core"); + pa->core_size = resource_size(res); core = devm_ioremap_resource(&ctrl->dev, res); if (IS_ERR(core)) { err = PTR_ERR(core); @@ -825,10 +896,7 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) pa->wr_base = core; pa->rd_base = core; } else { - u8 chan; - u16 ppid; - u32 regval; - + pa->core = core; pa->ver_ops = &pmic_arb_v2; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, @@ -847,24 +915,14 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) goto err_put_ctrl; } - pa->ppid_to_chan = devm_kzalloc(&ctrl->dev, - PPID_TO_CHAN_TABLE_SZ, GFP_KERNEL); + pa->ppid_to_chan = devm_kcalloc(&ctrl->dev, + PMIC_ARB_MAX_PPID, + sizeof(*pa->ppid_to_chan), + GFP_KERNEL); if (!pa->ppid_to_chan) { err = -ENOMEM; goto err_put_ctrl; } - /* - * PMIC_ARB_REG_CHNL is a table in HW mapping channel to ppid. - * ppid_to_chan is an in-memory invert of that table. - */ - for (chan = 0; chan < PMIC_ARB_MAX_CHNL; ++chan) { - regval = readl_relaxed(core + PMIC_ARB_REG_CHNL(chan)); - if (!regval) - continue; - - ppid = (regval >> 8) & 0xFFF; - pa->ppid_to_chan[ppid] = chan; - } } res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr"); @@ -915,9 +973,20 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) pa->ee = ee; - for (i = 0; i < ARRAY_SIZE(pa->mapping_table); ++i) - pa->mapping_table[i] = readl_relaxed( - pa->cnfg + SPMI_MAPPING_TABLE_REG(i)); + pa->apid_to_ppid = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS, + sizeof(*pa->apid_to_ppid), + GFP_KERNEL); + if (!pa->apid_to_ppid) { + err = -ENOMEM; + goto err_put_ctrl; + } + + pa->mapping_table = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS - 1, + sizeof(*pa->mapping_table), GFP_KERNEL); + if (!pa->mapping_table) { + err = -ENOMEM; + goto err_put_ctrl; + } /* Initialize max_apid/min_apid to the opposite bounds, during * the irq domain translation, we are sure to update these */ |