spmi: pmic_arb: add support for hw version 2
Qualcomm PMIC Arbiter version-2 changes from version-1 are:
- Some different register offsets.
- New channel register space, one per PMIC peripheral (ppid).
All tx traffic uses these channels.
- New observer register space. All rx trafic uses this space.
- Different command format for spmi command registers.
Reviewed-by: Sagar Dharia <sdharia@codeaurora.org>
Signed-off-by: Gilad Avidov <gavidov@codeaurora.org>
Tested-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 20559ab..d7119db 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -1,4 +1,5 @@
-/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+/*
+ * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -25,22 +26,18 @@
/* PMIC Arbiter configuration registers */
#define PMIC_ARB_VERSION 0x0000
+#define PMIC_ARB_VERSION_V2_MIN 0x20010000
#define PMIC_ARB_INT_EN 0x0004
-/* PMIC Arbiter channel registers */
-#define PMIC_ARB_CMD(N) (0x0800 + (0x80 * (N)))
-#define PMIC_ARB_CONFIG(N) (0x0804 + (0x80 * (N)))
-#define PMIC_ARB_STATUS(N) (0x0808 + (0x80 * (N)))
-#define PMIC_ARB_WDATA0(N) (0x0810 + (0x80 * (N)))
-#define PMIC_ARB_WDATA1(N) (0x0814 + (0x80 * (N)))
-#define PMIC_ARB_RDATA0(N) (0x0818 + (0x80 * (N)))
-#define PMIC_ARB_RDATA1(N) (0x081C + (0x80 * (N)))
-
-/* Interrupt Controller */
-#define SPMI_PIC_OWNER_ACC_STATUS(M, N) (0x0000 + ((32 * (M)) + (4 * (N))))
-#define SPMI_PIC_ACC_ENABLE(N) (0x0200 + (4 * (N)))
-#define SPMI_PIC_IRQ_STATUS(N) (0x0600 + (4 * (N)))
-#define SPMI_PIC_IRQ_CLEAR(N) (0x0A00 + (4 * (N)))
+/* PMIC Arbiter channel registers offsets */
+#define PMIC_ARB_CMD 0x00
+#define PMIC_ARB_CONFIG 0x04
+#define PMIC_ARB_STATUS 0x08
+#define PMIC_ARB_WDATA0 0x10
+#define PMIC_ARB_WDATA1 0x14
+#define PMIC_ARB_RDATA0 0x18
+#define PMIC_ARB_RDATA1 0x1C
+#define PMIC_ARB_REG_CHNL(N) (0x800 + 0x4 * (N))
/* Mapping Table */
#define SPMI_MAPPING_TABLE_REG(N) (0x0B00 + (4 * (N)))
@@ -52,6 +49,7 @@
#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*/
/* Ownership Table */
#define SPMI_OWNERSHIP_TABLE_REG(N) (0x0700 + (4 * (N)))
@@ -88,6 +86,7 @@
/* 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_TIMEOUT_US 100
#define PMIC_ARB_MAX_TRANS_BYTES (8)
@@ -98,14 +97,17 @@
/* interrupt enable bit */
#define SPMI_PIC_ACC_ENABLE_BIT BIT(0)
+struct pmic_arb_ver_ops;
+
/**
* spmi_pmic_arb_dev - SPMI PMIC Arbiter object
*
- * @base: address of the PMIC Arbiter core registers.
+ * @rd_base: on v1 "core", on v2 "observer" register base off DT.
+ * @wr_base: on v1 "core", on v2 "chnls" register base off DT.
* @intr: address of the SPMI interrupt control registers.
* @cnfg: address of the PMIC Arbiter configuration registers.
* @lock: lock to synchronize accesses.
- * @channel: which channel to use for accesses.
+ * @channel: execution environment channel to use for accesses.
* @irq: PMIC ARB interrupt.
* @ee: the current Execution Environment
* @min_apid: minimum APID (used for bounding IRQ search)
@@ -113,10 +115,14 @@
* @mapping_table: in-memory copy of PPID -> APID mapping table.
* @domain: irq domain object for PMIC IRQ domain
* @spmic: SPMI controller object
- * @apid_to_ppid: cached mapping from APID to PPID
+ * @apid_to_ppid: in-memory copy of APID -> PPID mapping table.
+ * @ver_ops: version dependent operations.
+ * @ppid_to_chan in-memory copy of PPID -> channel (APID) mapping table.
+ * v2 only.
*/
struct spmi_pmic_arb_dev {
- void __iomem *base;
+ void __iomem *rd_base;
+ void __iomem *wr_base;
void __iomem *intr;
void __iomem *cnfg;
raw_spinlock_t lock;
@@ -129,17 +135,54 @@
struct irq_domain *domain;
struct spmi_controller *spmic;
u16 apid_to_ppid[256];
+ const struct pmic_arb_ver_ops *ver_ops;
+ u8 *ppid_to_chan;
+};
+
+/**
+ * pmic_arb_ver: version dependent functionality.
+ *
+ * @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.
+ * on v2 offset of per-ee and per-ppid channel.
+ * @fmt_cmd: formats a GENI/SPMI command.
+ * @owner_acc_status: on v1 offset of PMIC_ARB_SPMI_PIC_OWNERm_ACC_STATUSn
+ * on v2 offset of SPMI_PIC_OWNERm_ACC_STATUSn.
+ * @acc_enable: on v1 offset of PMIC_ARB_SPMI_PIC_ACC_ENABLEn
+ * on v2 offset of SPMI_PIC_ACC_ENABLEn.
+ * @irq_status: on v1 offset of PMIC_ARB_SPMI_PIC_IRQ_STATUSn
+ * on v2 offset of SPMI_PIC_IRQ_STATUSn.
+ * @irq_clear: on v1 offset of PMIC_ARB_SPMI_PIC_IRQ_CLEARn
+ * on v2 offset of SPMI_PIC_IRQ_CLEARn.
+ */
+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);
+ 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);
};
static inline u32 pmic_arb_base_read(struct spmi_pmic_arb_dev *dev, u32 offset)
{
- return readl_relaxed(dev->base + offset);
+ return readl_relaxed(dev->rd_base + offset);
}
static inline void pmic_arb_base_write(struct spmi_pmic_arb_dev *dev,
u32 offset, u32 val)
{
- writel_relaxed(val, dev->base + offset);
+ writel_relaxed(val, dev->wr_base + offset);
+}
+
+static inline void pmic_arb_set_rd_cmd(struct spmi_pmic_arb_dev *dev,
+ u32 offset, u32 val)
+{
+ writel_relaxed(val, dev->rd_base + offset);
}
/**
@@ -168,15 +211,16 @@
pmic_arb_base_write(dev, reg, data);
}
-static int pmic_arb_wait_for_done(struct spmi_controller *ctrl)
+static int pmic_arb_wait_for_done(struct spmi_controller *ctrl,
+ void __iomem *base, u8 sid, u16 addr)
{
struct spmi_pmic_arb_dev *dev = spmi_controller_get_drvdata(ctrl);
u32 status = 0;
u32 timeout = PMIC_ARB_TIMEOUT_US;
- u32 offset = PMIC_ARB_STATUS(dev->channel);
+ u32 offset = dev->ver_ops->offset(dev, sid, addr) + PMIC_ARB_STATUS;
while (timeout--) {
- status = pmic_arb_base_read(dev, offset);
+ status = readl_relaxed(base + offset);
if (status & PMIC_ARB_STATUS_DONE) {
if (status & PMIC_ARB_STATUS_DENIED) {
@@ -211,26 +255,43 @@
return -ETIMEDOUT;
}
-/* Non-data command */
-static int pmic_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
+static int
+pmic_arb_non_data_cmd_v1(struct spmi_controller *ctrl, u8 opc, u8 sid)
{
struct spmi_pmic_arb_dev *pmic_arb = spmi_controller_get_drvdata(ctrl);
unsigned long flags;
u32 cmd;
int rc;
+ u32 offset = pmic_arb->ver_ops->offset(pmic_arb, sid, 0);
+
+ cmd = ((opc | 0x40) << 27) | ((sid & 0xf) << 20);
+
+ raw_spin_lock_irqsave(&pmic_arb->lock, flags);
+ pmic_arb_base_write(pmic_arb, offset + PMIC_ARB_CMD, cmd);
+ rc = pmic_arb_wait_for_done(ctrl, pmic_arb->wr_base, sid, 0);
+ raw_spin_unlock_irqrestore(&pmic_arb->lock, flags);
+
+ return rc;
+}
+
+static int
+pmic_arb_non_data_cmd_v2(struct spmi_controller *ctrl, u8 opc, u8 sid)
+{
+ return -EOPNOTSUPP;
+}
+
+/* Non-data command */
+static int pmic_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
+{
+ struct spmi_pmic_arb_dev *pmic_arb = spmi_controller_get_drvdata(ctrl);
+
+ dev_dbg(&ctrl->dev, "cmd op:0x%x sid:%d\n", opc, sid);
/* Check for valid non-data command */
if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP)
return -EINVAL;
- cmd = ((opc | 0x40) << 27) | ((sid & 0xf) << 20);
-
- raw_spin_lock_irqsave(&pmic_arb->lock, flags);
- pmic_arb_base_write(pmic_arb, PMIC_ARB_CMD(pmic_arb->channel), cmd);
- rc = pmic_arb_wait_for_done(ctrl);
- raw_spin_unlock_irqrestore(&pmic_arb->lock, flags);
-
- return rc;
+ return pmic_arb->ver_ops->non_data_cmd(ctrl, opc, sid);
}
static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
@@ -241,10 +302,11 @@
u8 bc = len - 1;
u32 cmd;
int rc;
+ u32 offset = pmic_arb->ver_ops->offset(pmic_arb, sid, addr);
if (bc >= PMIC_ARB_MAX_TRANS_BYTES) {
dev_err(&ctrl->dev,
- "pmic-arb supports 1..%d bytes per trans, but %d requested",
+ "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
PMIC_ARB_MAX_TRANS_BYTES, len);
return -EINVAL;
}
@@ -259,20 +321,20 @@
else
return -EINVAL;
- cmd = (opc << 27) | ((sid & 0xf) << 20) | (addr << 4) | (bc & 0x7);
+ cmd = pmic_arb->ver_ops->fmt_cmd(opc, sid, addr, bc);
raw_spin_lock_irqsave(&pmic_arb->lock, flags);
- pmic_arb_base_write(pmic_arb, PMIC_ARB_CMD(pmic_arb->channel), cmd);
- rc = pmic_arb_wait_for_done(ctrl);
+ pmic_arb_set_rd_cmd(pmic_arb, offset + PMIC_ARB_CMD, cmd);
+ rc = pmic_arb_wait_for_done(ctrl, pmic_arb->rd_base, sid, addr);
if (rc)
goto done;
- pa_read_data(pmic_arb, buf, PMIC_ARB_RDATA0(pmic_arb->channel),
+ pa_read_data(pmic_arb, buf, offset + PMIC_ARB_RDATA0,
min_t(u8, bc, 3));
if (bc > 3)
pa_read_data(pmic_arb, buf + 4,
- PMIC_ARB_RDATA1(pmic_arb->channel), bc - 4);
+ offset + PMIC_ARB_RDATA1, bc - 4);
done:
raw_spin_unlock_irqrestore(&pmic_arb->lock, flags);
@@ -287,10 +349,11 @@
u8 bc = len - 1;
u32 cmd;
int rc;
+ u32 offset = pmic_arb->ver_ops->offset(pmic_arb, sid, addr);
if (bc >= PMIC_ARB_MAX_TRANS_BYTES) {
dev_err(&ctrl->dev,
- "pmic-arb supports 1..%d bytes per trans, but:%d requested",
+ "pmic-arb supports 1..%d bytes per trans, but:%zu requested",
PMIC_ARB_MAX_TRANS_BYTES, len);
return -EINVAL;
}
@@ -307,19 +370,19 @@
else
return -EINVAL;
- cmd = (opc << 27) | ((sid & 0xf) << 20) | (addr << 4) | (bc & 0x7);
+ cmd = pmic_arb->ver_ops->fmt_cmd(opc, sid, addr, bc);
/* Write data to FIFOs */
raw_spin_lock_irqsave(&pmic_arb->lock, flags);
- pa_write_data(pmic_arb, buf, PMIC_ARB_WDATA0(pmic_arb->channel)
- , min_t(u8, bc, 3));
+ pa_write_data(pmic_arb, buf, offset + PMIC_ARB_WDATA0,
+ min_t(u8, bc, 3));
if (bc > 3)
pa_write_data(pmic_arb, buf + 4,
- PMIC_ARB_WDATA1(pmic_arb->channel), bc - 4);
+ offset + PMIC_ARB_WDATA1, bc - 4);
/* Start the transaction */
- pmic_arb_base_write(pmic_arb, PMIC_ARB_CMD(pmic_arb->channel), cmd);
- rc = pmic_arb_wait_for_done(ctrl);
+ pmic_arb_base_write(pmic_arb, offset + PMIC_ARB_CMD, cmd);
+ rc = pmic_arb_wait_for_done(ctrl, pmic_arb->wr_base, sid, addr);
raw_spin_unlock_irqrestore(&pmic_arb->lock, flags);
return rc;
@@ -376,7 +439,7 @@
u32 status;
int id;
- status = readl_relaxed(pa->intr + SPMI_PIC_IRQ_STATUS(apid));
+ status = readl_relaxed(pa->intr + pa->ver_ops->irq_status(apid));
while (status) {
id = ffs(status) - 1;
status &= ~(1 << id);
@@ -402,7 +465,7 @@
for (i = first; i <= last; ++i) {
status = readl_relaxed(intr +
- SPMI_PIC_OWNER_ACC_STATUS(pa->ee, i));
+ pa->ver_ops->owner_acc_status(pa->ee, i));
while (status) {
id = ffs(status) - 1;
status &= ~(1 << id);
@@ -422,7 +485,7 @@
u8 data;
raw_spin_lock_irqsave(&pa->lock, flags);
- writel_relaxed(1 << irq, pa->intr + SPMI_PIC_IRQ_CLEAR(apid));
+ writel_relaxed(1 << irq, pa->intr + pa->ver_ops->irq_clear(apid));
raw_spin_unlock_irqrestore(&pa->lock, flags);
data = 1 << irq;
@@ -439,10 +502,11 @@
u8 data;
raw_spin_lock_irqsave(&pa->lock, flags);
- status = readl_relaxed(pa->intr + SPMI_PIC_ACC_ENABLE(apid));
+ status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid));
if (status & SPMI_PIC_ACC_ENABLE_BIT) {
status = status & ~SPMI_PIC_ACC_ENABLE_BIT;
- writel_relaxed(status, pa->intr + SPMI_PIC_ACC_ENABLE(apid));
+ writel_relaxed(status, pa->intr +
+ pa->ver_ops->acc_enable(apid));
}
raw_spin_unlock_irqrestore(&pa->lock, flags);
@@ -460,10 +524,10 @@
u8 data;
raw_spin_lock_irqsave(&pa->lock, flags);
- status = readl_relaxed(pa->intr + SPMI_PIC_ACC_ENABLE(apid));
+ status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid));
if (!(status & SPMI_PIC_ACC_ENABLE_BIT)) {
writel_relaxed(status | SPMI_PIC_ACC_ENABLE_BIT,
- pa->intr + SPMI_PIC_ACC_ENABLE(apid));
+ pa->intr + pa->ver_ops->acc_enable(apid));
}
raw_spin_unlock_irqrestore(&pa->lock, flags);
@@ -624,6 +688,91 @@
return 0;
}
+/* v1 offset per ee */
+static u32 pmic_arb_offset_v1(struct spmi_pmic_arb_dev *pa, u8 sid, u16 addr)
+{
+ return 0x800 + 0x80 * pa->channel;
+}
+
+/* v2 offset per ppid (chan) and per ee */
+static u32 pmic_arb_offset_v2(struct spmi_pmic_arb_dev *pa, u8 sid, u16 addr)
+{
+ u16 ppid = (sid << 8) | (addr >> 8);
+ u8 chan = pa->ppid_to_chan[ppid];
+
+ return 0x1000 * pa->ee + 0x8000 * chan;
+}
+
+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);
+}
+
+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)
+{
+ return 0x20 * m + 0x4 * n;
+}
+
+static u32 pmic_arb_owner_acc_status_v2(u8 m, u8 n)
+{
+ return 0x100000 + 0x1000 * m + 0x4 * n;
+}
+
+static u32 pmic_arb_acc_enable_v1(u8 n)
+{
+ return 0x200 + 0x4 * n;
+}
+
+static u32 pmic_arb_acc_enable_v2(u8 n)
+{
+ return 0x1000 * n;
+}
+
+static u32 pmic_arb_irq_status_v1(u8 n)
+{
+ return 0x600 + 0x4 * n;
+}
+
+static u32 pmic_arb_irq_status_v2(u8 n)
+{
+ return 0x4 + 0x1000 * n;
+}
+
+static u32 pmic_arb_irq_clear_v1(u8 n)
+{
+ return 0xA00 + 0x4 * n;
+}
+
+static u32 pmic_arb_irq_clear_v2(u8 n)
+{
+ return 0x8 + 0x1000 * n;
+}
+
+static const struct pmic_arb_ver_ops pmic_arb_v1 = {
+ .non_data_cmd = pmic_arb_non_data_cmd_v1,
+ .offset = pmic_arb_offset_v1,
+ .fmt_cmd = pmic_arb_fmt_cmd_v1,
+ .owner_acc_status = pmic_arb_owner_acc_status_v1,
+ .acc_enable = pmic_arb_acc_enable_v1,
+ .irq_status = pmic_arb_irq_status_v1,
+ .irq_clear = pmic_arb_irq_clear_v1,
+};
+
+static const struct pmic_arb_ver_ops pmic_arb_v2 = {
+ .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_v2,
+ .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,
@@ -634,8 +783,10 @@
struct spmi_pmic_arb_dev *pa;
struct spmi_controller *ctrl;
struct resource *res;
- u32 channel, ee;
+ void __iomem *core;
+ u32 channel, ee, hw_ver;
int err, i;
+ bool is_v1;
ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*pa));
if (!ctrl)
@@ -645,12 +796,65 @@
pa->spmic = ctrl;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
- pa->base = devm_ioremap_resource(&ctrl->dev, res);
- if (IS_ERR(pa->base)) {
- err = PTR_ERR(pa->base);
+ core = devm_ioremap_resource(&ctrl->dev, res);
+ if (IS_ERR(core)) {
+ err = PTR_ERR(core);
goto err_put_ctrl;
}
+ 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) {
+ pa->ver_ops = &pmic_arb_v1;
+ pa->wr_base = core;
+ pa->rd_base = core;
+ } else {
+ u8 chan;
+ u16 ppid;
+ u32 regval;
+
+ pa->ver_ops = &pmic_arb_v2;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "obsrvr");
+ pa->rd_base = devm_ioremap_resource(&ctrl->dev, res);
+ if (IS_ERR(pa->rd_base)) {
+ err = PTR_ERR(pa->rd_base);
+ goto err_put_ctrl;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "chnls");
+ pa->wr_base = devm_ioremap_resource(&ctrl->dev, res);
+ if (IS_ERR(pa->wr_base)) {
+ err = PTR_ERR(pa->wr_base);
+ goto err_put_ctrl;
+ }
+
+ pa->ppid_to_chan = devm_kzalloc(&ctrl->dev,
+ PPID_TO_CHAN_TABLE_SZ, 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");
pa->intr = devm_ioremap_resource(&ctrl->dev, res);
if (IS_ERR(pa->intr)) {
@@ -731,9 +935,6 @@
if (err)
goto err_domain_remove;
- dev_dbg(&ctrl->dev, "PMIC Arb Version 0x%x\n",
- pmic_arb_base_read(pa, PMIC_ARB_VERSION));
-
return 0;
err_domain_remove: