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Message-Id: <20220914165212.3705892-3-vkoul@kernel.org>
Date: Wed, 14 Sep 2022 22:22:12 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Stephen Boyd <sboyd@...nel.org>
Cc: linux-arm-msm@...r.kernel.org,
Bjorn Andersson <andersson@...nel.org>,
David Collins <collinsd@...eaurora.org>,
linux-kernel@...r.kernel.org, Vinod Koul <vkoul@...nel.org>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: [PATCH v5 2/2] spmi: pmic-arb: Add support for PMIC v7
From: David Collins <collinsd@...eaurora.org>
PMIC v7 has different offset values and seqeunces, so add support for
this new version of PMIC
Signed-off-by: David Collins <collinsd@...eaurora.org>
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org> # SM8450 HDK
---
drivers/spmi/spmi-pmic-arb.c | 242 ++++++++++++++++++++++++++++++++---
1 file changed, 221 insertions(+), 21 deletions(-)
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 2cf3203b2397..8b6a42ab816f 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -22,8 +22,14 @@
#define PMIC_ARB_VERSION_V2_MIN 0x20010000
#define PMIC_ARB_VERSION_V3_MIN 0x30000000
#define PMIC_ARB_VERSION_V5_MIN 0x50000000
+#define PMIC_ARB_VERSION_V7_MIN 0x70000000
#define PMIC_ARB_INT_EN 0x0004
+#define PMIC_ARB_FEATURES 0x0004
+#define PMIC_ARB_FEATURES_PERIPH_MASK GENMASK(10, 0)
+
+#define PMIC_ARB_FEATURES1 0x0008
+
/* PMIC Arbiter channel registers offsets */
#define PMIC_ARB_CMD 0x00
#define PMIC_ARB_CONFIG 0x04
@@ -48,7 +54,6 @@
#define INVALID_EE 0xFF
/* Ownership Table */
-#define SPMI_OWNERSHIP_TABLE_REG(N) (0x0700 + (4 * (N)))
#define SPMI_OWNERSHIP_PERIPH2OWNER(X) ((X) & 0x7)
/* Channel Status fields */
@@ -91,6 +96,7 @@ enum pmic_arb_channel {
/* Maximum number of support PMIC peripherals */
#define PMIC_ARB_MAX_PERIPHS 512
+#define PMIC_ARB_MAX_PERIPHS_V7 1024
#define PMIC_ARB_TIMEOUT_US 1000
#define PMIC_ARB_MAX_TRANS_BYTES (8)
@@ -104,12 +110,12 @@ enum pmic_arb_channel {
((((slave_id) & 0xF) << 28) | \
(((periph_id) & 0xFF) << 20) | \
(((irq_id) & 0x7) << 16) | \
- (((apid) & 0x1FF) << 0))
+ (((apid) & 0x3FF) << 0))
#define hwirq_to_sid(hwirq) (((hwirq) >> 28) & 0xF)
#define hwirq_to_per(hwirq) (((hwirq) >> 20) & 0xFF)
#define hwirq_to_irq(hwirq) (((hwirq) >> 16) & 0x7)
-#define hwirq_to_apid(hwirq) (((hwirq) >> 0) & 0x1FF)
+#define hwirq_to_apid(hwirq) (((hwirq) >> 0) & 0x3FF)
struct pmic_arb_ver_ops;
@@ -130,13 +136,21 @@ struct apid_data {
* @channel: execution environment channel to use for accesses.
* @irq: PMIC ARB interrupt.
* @ee: the current Execution Environment
+ * @bus_instance: on v7: 0 = primary SPMI bus, 1 = secondary SPMI bus
* @min_apid: minimum APID (used for bounding IRQ search)
* @max_apid: maximum APID
+ * @base_apid: on v7: minimum APID associated with the particular SPMI
+ * bus instance
+ * @apid_count: on v5 and v7: number of APIDs associated with the
+ * particular SPMI bus instance
* @mapping_table: in-memory copy of PPID -> APID mapping table.
* @domain: irq domain object for PMIC IRQ domain
* @spmic: SPMI controller object
* @ver_ops: version dependent operations.
- * @ppid_to_apid in-memory copy of PPID -> APID mapping table.
+ * @ppid_to_apid: in-memory copy of PPID -> APID mapping table.
+ * @last_apid: Highest value APID in use
+ * @apid_data: Table of data for all APIDs
+ * @max_periphs: Number of elements in apid_data[]
*/
struct spmi_pmic_arb {
void __iomem *rd_base;
@@ -149,8 +163,11 @@ struct spmi_pmic_arb {
u8 channel;
int irq;
u8 ee;
+ u32 bus_instance;
u16 min_apid;
u16 max_apid;
+ u16 base_apid;
+ int apid_count;
u32 *mapping_table;
DECLARE_BITMAP(mapping_table_valid, PMIC_ARB_MAX_PERIPHS);
struct irq_domain *domain;
@@ -158,7 +175,8 @@ struct spmi_pmic_arb {
const struct pmic_arb_ver_ops *ver_ops;
u16 *ppid_to_apid;
u16 last_apid;
- struct apid_data apid_data[PMIC_ARB_MAX_PERIPHS];
+ struct apid_data *apid_data;
+ int max_periphs;
};
/**
@@ -180,6 +198,7 @@ struct spmi_pmic_arb {
* @irq_clear: on v1 address of PMIC_ARB_SPMI_PIC_IRQ_CLEARn
* on v2 address of SPMI_PIC_IRQ_CLEARn.
* @apid_map_offset: offset of PMIC_ARB_REG_CHNLn
+ * @apid_owner: on v2 and later address of SPMI_PERIPHn_2OWNER_TABLE_REG
*/
struct pmic_arb_ver_ops {
const char *ver_str;
@@ -196,6 +215,7 @@ struct pmic_arb_ver_ops {
void __iomem *(*irq_status)(struct spmi_pmic_arb *pmic_arb, u16 n);
void __iomem *(*irq_clear)(struct spmi_pmic_arb *pmic_arb, u16 n);
u32 (*apid_map_offset)(u16 n);
+ void __iomem *(*apid_owner)(struct spmi_pmic_arb *pmic_arb, u16 n);
};
static inline void pmic_arb_base_write(struct spmi_pmic_arb *pmic_arb,
@@ -627,6 +647,11 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
struct irq_chip *chip = irq_desc_get_chip(desc);
int first = pmic_arb->min_apid;
int last = pmic_arb->max_apid;
+ /*
+ * acc_offset will be non-zero for the secondary SPMI bus instance on
+ * v7 controllers.
+ */
+ int acc_offset = pmic_arb->base_apid >> 5;
u8 ee = pmic_arb->ee;
u32 status, enable, handled = 0;
int i, id, apid;
@@ -637,8 +662,7 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
chained_irq_enter(chip, desc);
for (i = first >> 5; i <= last >> 5; ++i) {
- status = readl_relaxed(
- ver_ops->owner_acc_status(pmic_arb, ee, i));
+ status = readl_relaxed(ver_ops->owner_acc_status(pmic_arb, ee, i - acc_offset));
if (status)
acc_valid = true;
@@ -983,8 +1007,8 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
if (offset >= pmic_arb->core_size)
break;
- regval = readl_relaxed(pmic_arb->cnfg +
- SPMI_OWNERSHIP_TABLE_REG(apid));
+ regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(pmic_arb,
+ apid));
apidd->irq_ee = SPMI_OWNERSHIP_PERIPH2OWNER(regval);
apidd->write_ee = apidd->irq_ee;
@@ -1020,21 +1044,30 @@ static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u16 ppid)
static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
{
- struct apid_data *apidd = pmic_arb->apid_data;
+ struct apid_data *apidd;
struct apid_data *prev_apidd;
- u16 i, apid, ppid;
+ u16 i, apid, ppid, apid_max;
bool valid, is_irq_ee;
u32 regval, offset;
/*
* In order to allow multiple EEs to write to a single PPID in arbiter
- * version 5, there is more than one APID mapped to each PPID.
+ * version 5 and 7, there is more than one APID mapped to each PPID.
* The owner field for each of these mappings specifies the EE which is
* allowed to write to the APID. The owner of the last (highest) APID
* which has the IRQ owner bit set for a given PPID will receive
* interrupts from the PPID.
+ *
+ * In arbiter version 7, the APID numbering space is divided between
+ * the primary bus (0) and secondary bus (1) such that:
+ * APID = 0 to N-1 are assigned to the primary bus
+ * APID = N to N+M-1 are assigned to the secondary bus
+ * where N = number of APIDs supported by the primary bus and
+ * M = number of APIDs supported by the secondary bus
*/
- for (i = 0; ; i++, apidd++) {
+ apidd = &pmic_arb->apid_data[pmic_arb->base_apid];
+ apid_max = pmic_arb->base_apid + pmic_arb->apid_count;
+ for (i = pmic_arb->base_apid; i < apid_max; i++, apidd++) {
offset = pmic_arb->ver_ops->apid_map_offset(i);
if (offset >= pmic_arb->core_size)
break;
@@ -1045,8 +1078,8 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
ppid = (regval >> 8) & PMIC_ARB_PPID_MASK;
is_irq_ee = PMIC_ARB_CHAN_IS_IRQ_OWNER(regval);
- regval = readl_relaxed(pmic_arb->cnfg +
- SPMI_OWNERSHIP_TABLE_REG(i));
+ regval = readl_relaxed(pmic_arb->ver_ops->apid_owner(pmic_arb,
+ i));
apidd->write_ee = SPMI_OWNERSHIP_PERIPH2OWNER(regval);
apidd->irq_ee = is_irq_ee ? apidd->write_ee : INVALID_EE;
@@ -1145,6 +1178,40 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
return offset;
}
+/*
+ * v7 offset per ee and per apid for observer channels and per apid for
+ * read/write channels.
+ */
+static int pmic_arb_offset_v7(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
+ enum pmic_arb_channel ch_type)
+{
+ u16 apid;
+ int rc;
+ u32 offset = 0;
+ u16 ppid = (sid << 8) | (addr >> 8);
+
+ rc = pmic_arb->ver_ops->ppid_to_apid(pmic_arb, ppid);
+ if (rc < 0)
+ return rc;
+
+ apid = rc;
+ switch (ch_type) {
+ case PMIC_ARB_CHANNEL_OBS:
+ offset = 0x8000 * pmic_arb->ee + 0x20 * apid;
+ break;
+ case PMIC_ARB_CHANNEL_RW:
+ if (pmic_arb->apid_data[apid].write_ee != pmic_arb->ee) {
+ dev_err(&pmic_arb->spmic->dev, "disallowed SPMI write to sid=%u, addr=0x%04X\n",
+ sid, addr);
+ return -EPERM;
+ }
+ offset = 0x1000 * apid;
+ break;
+ }
+
+ return offset;
+}
+
static u32 pmic_arb_fmt_cmd_v1(u8 opc, u8 sid, u16 addr, u8 bc)
{
return (opc << 27) | ((sid & 0xf) << 20) | (addr << 4) | (bc & 0x7);
@@ -1179,6 +1246,12 @@ pmic_arb_owner_acc_status_v5(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
return pmic_arb->intr + 0x10000 * m + 0x4 * n;
}
+static void __iomem *
+pmic_arb_owner_acc_status_v7(struct spmi_pmic_arb *pmic_arb, u8 m, u16 n)
+{
+ return pmic_arb->intr + 0x1000 * m + 0x4 * n;
+}
+
static void __iomem *
pmic_arb_acc_enable_v1(struct spmi_pmic_arb *pmic_arb, u16 n)
{
@@ -1197,6 +1270,12 @@ pmic_arb_acc_enable_v5(struct spmi_pmic_arb *pmic_arb, u16 n)
return pmic_arb->wr_base + 0x100 + 0x10000 * n;
}
+static void __iomem *
+pmic_arb_acc_enable_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
+{
+ return pmic_arb->wr_base + 0x100 + 0x1000 * n;
+}
+
static void __iomem *
pmic_arb_irq_status_v1(struct spmi_pmic_arb *pmic_arb, u16 n)
{
@@ -1215,6 +1294,12 @@ pmic_arb_irq_status_v5(struct spmi_pmic_arb *pmic_arb, u16 n)
return pmic_arb->wr_base + 0x104 + 0x10000 * n;
}
+static void __iomem *
+pmic_arb_irq_status_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
+{
+ return pmic_arb->wr_base + 0x104 + 0x1000 * n;
+}
+
static void __iomem *
pmic_arb_irq_clear_v1(struct spmi_pmic_arb *pmic_arb, u16 n)
{
@@ -1233,6 +1318,12 @@ pmic_arb_irq_clear_v5(struct spmi_pmic_arb *pmic_arb, u16 n)
return pmic_arb->wr_base + 0x108 + 0x10000 * n;
}
+static void __iomem *
+pmic_arb_irq_clear_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
+{
+ return pmic_arb->wr_base + 0x108 + 0x1000 * n;
+}
+
static u32 pmic_arb_apid_map_offset_v2(u16 n)
{
return 0x800 + 0x4 * n;
@@ -1243,6 +1334,28 @@ static u32 pmic_arb_apid_map_offset_v5(u16 n)
return 0x900 + 0x4 * n;
}
+static u32 pmic_arb_apid_map_offset_v7(u16 n)
+{
+ return 0x2000 + 0x4 * n;
+}
+
+static void __iomem *
+pmic_arb_apid_owner_v2(struct spmi_pmic_arb *pmic_arb, u16 n)
+{
+ return pmic_arb->cnfg + 0x700 + 0x4 * n;
+}
+
+/*
+ * For arbiter version 7, APID ownership table registers have independent
+ * numbering space for each SPMI bus instance, so each is indexed starting from
+ * 0.
+ */
+static void __iomem *
+pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
+{
+ return pmic_arb->cnfg + 0x4 * (n - pmic_arb->base_apid);
+}
+
static const struct pmic_arb_ver_ops pmic_arb_v1 = {
.ver_str = "v1",
.ppid_to_apid = pmic_arb_ppid_to_apid_v1,
@@ -1254,6 +1367,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 = {
.irq_status = pmic_arb_irq_status_v1,
.irq_clear = pmic_arb_irq_clear_v1,
.apid_map_offset = pmic_arb_apid_map_offset_v2,
+ .apid_owner = pmic_arb_apid_owner_v2,
};
static const struct pmic_arb_ver_ops pmic_arb_v2 = {
@@ -1267,6 +1381,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 = {
.irq_status = pmic_arb_irq_status_v2,
.irq_clear = pmic_arb_irq_clear_v2,
.apid_map_offset = pmic_arb_apid_map_offset_v2,
+ .apid_owner = pmic_arb_apid_owner_v2,
};
static const struct pmic_arb_ver_ops pmic_arb_v3 = {
@@ -1280,6 +1395,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 = {
.irq_status = pmic_arb_irq_status_v2,
.irq_clear = pmic_arb_irq_clear_v2,
.apid_map_offset = pmic_arb_apid_map_offset_v2,
+ .apid_owner = pmic_arb_apid_owner_v2,
};
static const struct pmic_arb_ver_ops pmic_arb_v5 = {
@@ -1293,6 +1409,21 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 = {
.irq_status = pmic_arb_irq_status_v5,
.irq_clear = pmic_arb_irq_clear_v5,
.apid_map_offset = pmic_arb_apid_map_offset_v5,
+ .apid_owner = pmic_arb_apid_owner_v2,
+};
+
+static const struct pmic_arb_ver_ops pmic_arb_v7 = {
+ .ver_str = "v7",
+ .ppid_to_apid = pmic_arb_ppid_to_apid_v5,
+ .non_data_cmd = pmic_arb_non_data_cmd_v2,
+ .offset = pmic_arb_offset_v7,
+ .fmt_cmd = pmic_arb_fmt_cmd_v2,
+ .owner_acc_status = pmic_arb_owner_acc_status_v7,
+ .acc_enable = pmic_arb_acc_enable_v7,
+ .irq_status = pmic_arb_irq_status_v7,
+ .irq_clear = pmic_arb_irq_clear_v7,
+ .apid_map_offset = pmic_arb_apid_map_offset_v7,
+ .apid_owner = pmic_arb_apid_owner_v7,
};
static const struct irq_domain_ops pmic_arb_irq_domain_ops = {
@@ -1319,8 +1450,18 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
pmic_arb = spmi_controller_get_drvdata(ctrl);
pmic_arb->spmic = ctrl;
+ /*
+ * Please don't replace this with devm_platform_ioremap_resource() or
+ * devm_ioremap_resource(). These both result in a call to
+ * devm_request_mem_region() which prevents multiple mappings of this
+ * register address range. SoCs with PMIC arbiter v7 may define two
+ * arbiter devices, for the two physical SPMI interfaces, which share
+ * some register address ranges (i.e. "core", "obsrvr", and "chnls").
+ * Ensure that both devices probe successfully by calling devm_ioremap()
+ * which does not result in a devm_request_mem_region() call.
+ */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
- core = devm_ioremap_resource(&ctrl->dev, res);
+ core = devm_ioremap(&ctrl->dev, res->start, resource_size(res));
if (IS_ERR(core)) {
err = PTR_ERR(core);
goto err_put_ctrl;
@@ -1349,12 +1490,15 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
pmic_arb->ver_ops = &pmic_arb_v2;
else if (hw_ver < PMIC_ARB_VERSION_V5_MIN)
pmic_arb->ver_ops = &pmic_arb_v3;
- else
+ else if (hw_ver < PMIC_ARB_VERSION_V7_MIN)
pmic_arb->ver_ops = &pmic_arb_v5;
+ else
+ pmic_arb->ver_ops = &pmic_arb_v7;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"obsrvr");
- pmic_arb->rd_base = devm_ioremap_resource(&ctrl->dev, res);
+ pmic_arb->rd_base = devm_ioremap(&ctrl->dev, res->start,
+ resource_size(res));
if (IS_ERR(pmic_arb->rd_base)) {
err = PTR_ERR(pmic_arb->rd_base);
goto err_put_ctrl;
@@ -1362,13 +1506,69 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"chnls");
- pmic_arb->wr_base = devm_ioremap_resource(&ctrl->dev, res);
+ pmic_arb->wr_base = devm_ioremap(&ctrl->dev, res->start,
+ resource_size(res));
if (IS_ERR(pmic_arb->wr_base)) {
err = PTR_ERR(pmic_arb->wr_base);
goto err_put_ctrl;
}
}
+ pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
+
+ if (hw_ver >= PMIC_ARB_VERSION_V7_MIN) {
+ pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7;
+ /* Optional property for v7: */
+ of_property_read_u32(pdev->dev.of_node, "qcom,bus-id",
+ &pmic_arb->bus_instance);
+ if (pmic_arb->bus_instance > 1) {
+ err = -EINVAL;
+ dev_err(&pdev->dev, "invalid bus instance (%u) specified\n",
+ pmic_arb->bus_instance);
+ goto err_put_ctrl;
+ }
+
+ if (pmic_arb->bus_instance == 0) {
+ pmic_arb->base_apid = 0;
+ pmic_arb->apid_count =
+ readl_relaxed(core + PMIC_ARB_FEATURES) &
+ PMIC_ARB_FEATURES_PERIPH_MASK;
+ } else {
+ pmic_arb->base_apid =
+ readl_relaxed(core + PMIC_ARB_FEATURES) &
+ PMIC_ARB_FEATURES_PERIPH_MASK;
+ pmic_arb->apid_count =
+ readl_relaxed(core + PMIC_ARB_FEATURES1) &
+ PMIC_ARB_FEATURES_PERIPH_MASK;
+ }
+
+ if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
+ err = -EINVAL;
+ dev_err(&pdev->dev, "Unsupported APID count %d detected\n",
+ pmic_arb->base_apid + pmic_arb->apid_count);
+ goto err_put_ctrl;
+ }
+ } else if (hw_ver >= PMIC_ARB_VERSION_V5_MIN) {
+ pmic_arb->base_apid = 0;
+ pmic_arb->apid_count = readl_relaxed(core + PMIC_ARB_FEATURES) &
+ PMIC_ARB_FEATURES_PERIPH_MASK;
+
+ if (pmic_arb->apid_count > pmic_arb->max_periphs) {
+ err = -EINVAL;
+ dev_err(&pdev->dev, "Unsupported APID count %d detected\n",
+ pmic_arb->apid_count);
+ goto err_put_ctrl;
+ }
+ }
+
+ pmic_arb->apid_data = devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs,
+ sizeof(*pmic_arb->apid_data),
+ GFP_KERNEL);
+ if (!pmic_arb->apid_data) {
+ err = -ENOMEM;
+ goto err_put_ctrl;
+ }
+
dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
pmic_arb->ver_ops->ver_str, hw_ver);
@@ -1420,7 +1620,7 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
}
pmic_arb->ee = ee;
- mapping_table = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS,
+ mapping_table = devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs,
sizeof(*mapping_table), GFP_KERNEL);
if (!mapping_table) {
err = -ENOMEM;
@@ -1431,7 +1631,7 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
/* Initialize max_apid/min_apid to the opposite bounds, during
* the irq domain translation, we are sure to update these */
pmic_arb->max_apid = 0;
- pmic_arb->min_apid = PMIC_ARB_MAX_PERIPHS - 1;
+ pmic_arb->min_apid = pmic_arb->max_periphs - 1;
platform_set_drvdata(pdev, ctrl);
raw_spin_lock_init(&pmic_arb->lock);
--
2.37.3
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