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Subject[PATCH 10/11] spmi: pmic_arb: add support for PMIC bus arbiter v3
Date
From: Abhijeet Dharmapurikar <adharmap@codeaurora.org>

PMIC bus arbiter v3 supports 512 SPMI peripherals. Add the v3 operators to
support this new arbiter version.

Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>
---
drivers/spmi/spmi-pmic-arb.c | 133 +++++++++++++++++++++++++++----------------
1 file changed, 83 insertions(+), 50 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index f8638fa..0deac33 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -28,6 +28,7 @@
/* PMIC Arbiter configuration registers */
#define PMIC_ARB_VERSION 0x0000
#define PMIC_ARB_VERSION_V2_MIN 0x20010000
+#define PMIC_ARB_VERSION_V3_MIN 0x30000000
#define PMIC_ARB_INT_EN 0x0004

/* PMIC Arbiter channel registers offsets */
@@ -96,6 +97,17 @@ enum pmic_arb_cmd_op_code {
/* interrupt enable bit */
#define SPMI_PIC_ACC_ENABLE_BIT BIT(0)

+#define HWIRQ(slave_id, periph_id, irq_id, apid) \
+ ((((slave_id) & 0xF) << 28) | \
+ (((periph_id) & 0xFF) << 20) | \
+ (((irq_id) & 0x7) << 16) | \
+ (((apid) & 0x1FF) << 0))
+
+#define HWIRQ_SID(hwirq) (((hwirq) >> 28) & 0xF)
+#define HWIRQ_PER(hwirq) (((hwirq) >> 20) & 0xFF)
+#define HWIRQ_IRQ(hwirq) (((hwirq) >> 16) & 0x7)
+#define HWIRQ_APID(hwirq) (((hwirq) >> 0) & 0x1FF)
+
struct pmic_arb_ver_ops;

struct apid_data {
@@ -151,7 +163,9 @@ struct spmi_pmic_arb {
/**
* pmic_arb_ver: version dependent functionality.
*
- * @mode: access rights to specified pmic peripheral.
+ * @ver_str: version string.
+ * @ppid_to_apid: finds the apid for a given ppid.
+ * @mode: access rights to specified pmic peripheral.
* @non_data_cmd: on v1 issues an spmi non-data command.
* on v2 no HW support, returns -EOPNOTSUPP.
* @offset: on v1 offset of per-ee channel.
@@ -167,8 +181,9 @@ struct spmi_pmic_arb {
* on v2 offset of SPMI_PIC_IRQ_CLEARn.
*/
struct pmic_arb_ver_ops {
+ const char *ver_str;
int (*ppid_to_apid)(struct spmi_pmic_arb *pa, u8 sid, u16 addr,
- u8 *apid);
+ u16 *apid);
int (*mode)(struct spmi_pmic_arb *dev, u8 sid, u16 addr,
mode_t *mode);
/* spmi commands (read_cmd, write_cmd, cmd) functionality */
@@ -177,10 +192,10 @@ struct pmic_arb_ver_ops {
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) */
- u32 (*owner_acc_status)(u8 m, u8 n);
- u32 (*acc_enable)(u8 n);
- u32 (*irq_status)(u8 n);
- u32 (*irq_clear)(u8 n);
+ u32 (*owner_acc_status)(u8 m, u16 n);
+ u32 (*acc_enable)(u16 n);
+ u32 (*irq_status)(u16 n);
+ u32 (*irq_clear)(u16 n);
};

static inline void pmic_arb_base_write(struct spmi_pmic_arb *pa,
@@ -462,8 +477,8 @@ static void qpnpint_spmi_write(struct irq_data *d, u8 reg, void *buf,
size_t len)
{
struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d);
- u8 sid = d->hwirq >> 24;
- u8 per = d->hwirq >> 16;
+ u8 sid = HWIRQ_SID(d->hwirq);
+ u8 per = HWIRQ_PER(d->hwirq);

if (pmic_arb_write_cmd(pa->spmic, SPMI_CMD_EXT_WRITEL, sid,
(per << 8) + reg, buf, len))
@@ -475,8 +490,8 @@ static void qpnpint_spmi_write(struct irq_data *d, u8 reg, void *buf,
static void qpnpint_spmi_read(struct irq_data *d, u8 reg, void *buf, size_t len)
{
struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d);
- u8 sid = d->hwirq >> 24;
- u8 per = d->hwirq >> 16;
+ u8 sid = HWIRQ_SID(d->hwirq);
+ u8 per = HWIRQ_PER(d->hwirq);

if (pmic_arb_read_cmd(pa->spmic, SPMI_CMD_EXT_READL, sid,
(per << 8) + reg, buf, len))
@@ -485,7 +500,7 @@ static void qpnpint_spmi_read(struct irq_data *d, u8 reg, void *buf, size_t len)
d->irq);
}

-static void cleanup_irq(struct spmi_pmic_arb *pa, u8 apid, int id)
+static void cleanup_irq(struct spmi_pmic_arb *pa, u16 apid, int id)
{
u16 ppid = pa->apid_data[apid].ppid;
u8 sid = ppid >> 8;
@@ -507,20 +522,19 @@ static void cleanup_irq(struct spmi_pmic_arb *pa, u8 apid, int id)
irq_mask, ppid);
}

-static void periph_interrupt(struct spmi_pmic_arb *pa, u8 apid)
+static void periph_interrupt(struct spmi_pmic_arb *pa, u16 apid)
{
unsigned int irq;
u32 status;
int id;
+ u8 sid = (pa->apid_data[apid].ppid >> 8) & 0xF;
+ u8 per = pa->apid_data[apid].ppid & 0xFF;

status = readl_relaxed(pa->intr + pa->ver_ops->irq_status(apid));
while (status) {
id = ffs(status) - 1;
status &= ~BIT(id);
- irq = irq_find_mapping(pa->domain,
- pa->apid_data[apid].ppid << 16
- | id << 8
- | apid);
+ irq = irq_find_mapping(pa->domain, HWIRQ(sid, per, id, apid));
if (irq == 0) {
cleanup_irq(pa, apid, id);
continue;
@@ -561,8 +575,8 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
static void qpnpint_irq_ack(struct irq_data *d)
{
struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d);
- u8 irq = d->hwirq >> 8;
- u8 apid = d->hwirq;
+ u8 irq = HWIRQ_IRQ(d->hwirq);
+ u16 apid = HWIRQ_APID(d->hwirq);
u8 data;

writel_relaxed(BIT(irq), pa->intr + pa->ver_ops->irq_clear(apid));
@@ -573,7 +587,7 @@ static void qpnpint_irq_ack(struct irq_data *d)

static void qpnpint_irq_mask(struct irq_data *d)
{
- u8 irq = d->hwirq >> 8;
+ u8 irq = HWIRQ_IRQ(d->hwirq);
u8 data = BIT(irq);

qpnpint_spmi_write(d, QPNPINT_REG_EN_CLR, &data, 1);
@@ -582,8 +596,8 @@ static void qpnpint_irq_mask(struct irq_data *d)
static void qpnpint_irq_unmask(struct irq_data *d)
{
struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d);
- u8 irq = d->hwirq >> 8;
- u8 apid = d->hwirq;
+ u8 irq = HWIRQ_IRQ(d->hwirq);
+ u16 apid = HWIRQ_APID(d->hwirq);
u8 buf[2];

writel_relaxed(SPMI_PIC_ACC_ENABLE_BIT,
@@ -605,7 +619,7 @@ static void qpnpint_irq_unmask(struct irq_data *d)
static int qpnpint_irq_set_type(struct irq_data *d, unsigned int flow_type)
{
struct spmi_pmic_arb_qpnpint_type type;
- u8 irq = d->hwirq >> 8;
+ u8 irq = HWIRQ_IRQ(d->hwirq);
u8 bit_mask_irq = BIT(irq);

qpnpint_spmi_read(d, QPNPINT_REG_SET_TYPE, &type, sizeof(type));
@@ -642,7 +656,7 @@ static int qpnpint_get_irqchip_state(struct irq_data *d,
enum irqchip_irq_state which,
bool *state)
{
- u8 irq = d->hwirq >> 8;
+ u8 irq = HWIRQ_IRQ(d->hwirq);
u8 status = 0;

if (which != IRQCHIP_STATE_LINE_LEVEL)
@@ -674,7 +688,7 @@ static int qpnpint_irq_domain_dt_translate(struct irq_domain *d,
{
struct spmi_pmic_arb *pa = d->host_data;
int rc;
- u8 apid;
+ u16 apid;

dev_dbg(&pa->spmic->dev,
"intspec[0] 0x%1x intspec[1] 0x%02x intspec[2] 0x%02x\n",
@@ -702,10 +716,7 @@ static int qpnpint_irq_domain_dt_translate(struct irq_domain *d,
if (apid < pa->min_apid)
pa->min_apid = apid;

- *out_hwirq = (intspec[0] & 0xF) << 24
- | (intspec[1] & 0xFF) << 16
- | (intspec[2] & 0x7) << 8
- | apid;
+ *out_hwirq = HWIRQ(intspec[0], intspec[1], intspec[2], apid);
*out_type = intspec[3] & IRQ_TYPE_SENSE_MASK;

dev_dbg(&pa->spmic->dev, "out_hwirq = %lu\n", *out_hwirq);
@@ -728,7 +739,7 @@ static int qpnpint_irq_domain_map(struct irq_domain *d,
}

static int
-pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u8 *apid)
+pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u16 *apid)
{
u16 ppid = sid << 8 | ((addr >> 8) & 0xFF);
u32 *mapping_table = pa->mapping_table;
@@ -776,7 +787,7 @@ static int qpnpint_irq_domain_map(struct irq_domain *d,
}

static int
-pmic_arb_mode_v1(struct spmi_pmic_arb *pa, u8 sid, u16 addr, mode_t *mode)
+pmic_arb_mode_v1_v3(struct spmi_pmic_arb *pa, u8 sid, u16 addr, mode_t *mode)
{
*mode = S_IRUSR | S_IWUSR;
return 0;
@@ -828,7 +839,7 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid)


static int
-pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u8 *apid)
+pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u16 *apid)
{
u16 ppid = (sid << 8) | (addr >> 8);
u16 apid_valid;
@@ -846,7 +857,7 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid)
static int
pmic_arb_mode_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, mode_t *mode)
{
- u8 apid;
+ u16 apid;
int rc;

rc = pmic_arb_ppid_to_apid_v2(pa, sid, addr, &apid);
@@ -865,7 +876,7 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid)
static int
pmic_arb_offset_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u32 *offset)
{
- u8 apid;
+ u16 apid;
int rc;

rc = pmic_arb_ppid_to_apid_v2(pa, sid, addr, &apid);
@@ -886,49 +897,55 @@ static u32 pmic_arb_fmt_cmd_v2(u8 opc, u8 sid, u16 addr, u8 bc)
return (opc << 27) | ((addr & 0xff) << 4) | (bc & 0x7);
}

-static u32 pmic_arb_owner_acc_status_v1(u8 m, u8 n)
+static u32 pmic_arb_owner_acc_status_v1(u8 m, u16 n)
{
return 0x20 * m + 0x4 * n;
}

-static u32 pmic_arb_owner_acc_status_v2(u8 m, u8 n)
+static u32 pmic_arb_owner_acc_status_v2(u8 m, u16 n)
{
return 0x100000 + 0x1000 * m + 0x4 * n;
}

-static u32 pmic_arb_acc_enable_v1(u8 n)
+static u32 pmic_arb_owner_acc_status_v3(u8 m, u16 n)
+{
+ return 0x200000 + 0x1000 * m + 0x4 * n;
+}
+
+static u32 pmic_arb_acc_enable_v1(u16 n)
{
return 0x200 + 0x4 * n;
}

-static u32 pmic_arb_acc_enable_v2(u8 n)
+static u32 pmic_arb_acc_enable_v2(u16 n)
{
return 0x1000 * n;
}

-static u32 pmic_arb_irq_status_v1(u8 n)
+static u32 pmic_arb_irq_status_v1(u16 n)
{
return 0x600 + 0x4 * n;
}

-static u32 pmic_arb_irq_status_v2(u8 n)
+static u32 pmic_arb_irq_status_v2(u16 n)
{
return 0x4 + 0x1000 * n;
}

-static u32 pmic_arb_irq_clear_v1(u8 n)
+static u32 pmic_arb_irq_clear_v1(u16 n)
{
return 0xA00 + 0x4 * n;
}

-static u32 pmic_arb_irq_clear_v2(u8 n)
+static u32 pmic_arb_irq_clear_v2(u16 n)
{
return 0x8 + 0x1000 * n;
}

static const struct pmic_arb_ver_ops pmic_arb_v1 = {
+ .ver_str = "v1",
.ppid_to_apid = pmic_arb_ppid_to_apid_v1,
- .mode = pmic_arb_mode_v1,
+ .mode = pmic_arb_mode_v1_v3,
.non_data_cmd = pmic_arb_non_data_cmd_v1,
.offset = pmic_arb_offset_v1,
.fmt_cmd = pmic_arb_fmt_cmd_v1,
@@ -939,6 +956,7 @@ static u32 pmic_arb_irq_clear_v2(u8 n)
};

static const struct pmic_arb_ver_ops pmic_arb_v2 = {
+ .ver_str = "v2",
.ppid_to_apid = pmic_arb_ppid_to_apid_v2,
.mode = pmic_arb_mode_v2,
.non_data_cmd = pmic_arb_non_data_cmd_v2,
@@ -950,6 +968,19 @@ static u32 pmic_arb_irq_clear_v2(u8 n)
.irq_clear = pmic_arb_irq_clear_v2,
};

+static const struct pmic_arb_ver_ops pmic_arb_v3 = {
+ .ver_str = "v3",
+ .ppid_to_apid = pmic_arb_ppid_to_apid_v2,
+ .mode = pmic_arb_mode_v1_v3,
+ .non_data_cmd = pmic_arb_non_data_cmd_v2,
+ .offset = pmic_arb_offset_v2,
+ .fmt_cmd = pmic_arb_fmt_cmd_v2,
+ .owner_acc_status = pmic_arb_owner_acc_status_v3,
+ .acc_enable = pmic_arb_acc_enable_v2,
+ .irq_status = pmic_arb_irq_status_v2,
+ .irq_clear = pmic_arb_irq_clear_v2,
+};
+
static const struct irq_domain_ops pmic_arb_irq_domain_ops = {
.map = qpnpint_irq_domain_map,
.xlate = qpnpint_irq_domain_dt_translate,
@@ -963,7 +994,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
void __iomem *core;
u32 channel, ee, hw_ver;
int err;
- bool is_v1;

ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*pa));
if (!ctrl)
@@ -987,21 +1017,21 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
}

hw_ver = readl_relaxed(core + PMIC_ARB_VERSION);
- is_v1 = (hw_ver < PMIC_ARB_VERSION_V2_MIN);
-
- dev_info(&ctrl->dev, "PMIC Arb Version-%d (0x%x)\n", (is_v1 ? 1 : 2),
- hw_ver);

- if (is_v1) {
+ if (hw_ver < PMIC_ARB_VERSION_V2_MIN) {
pa->ver_ops = &pmic_arb_v1;
pa->wr_base = core;
pa->rd_base = core;
} else {
pa->core = core;
- pa->ver_ops = &pmic_arb_v2;
+
+ if (hw_ver < PMIC_ARB_VERSION_V3_MIN)
+ pa->ver_ops = &pmic_arb_v2;
+ else
+ pa->ver_ops = &pmic_arb_v3;

/* the apid to ppid table starts at PMIC_ARB_REG_CHNL(0) */
- pa->max_periph = (pa->core_size - PMIC_ARB_REG_CHNL(0)) / 4;
+ pa->max_periph = (pa->core_size - PMIC_ARB_REG_CHNL(0)) / 4;

res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"obsrvr");
@@ -1029,6 +1059,9 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
}
}

+ dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
+ pa->ver_ops->ver_str, hw_ver);
+
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr");
pa->intr = devm_ioremap_resource(&ctrl->dev, res);
if (IS_ERR(pa->intr)) {
--
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