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path: root/drivers/bus/brcmstb_gisb.c
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Diffstat (limited to 'drivers/bus/brcmstb_gisb.c')
-rw-r--r--drivers/bus/brcmstb_gisb.c130
1 files changed, 106 insertions, 24 deletions
diff --git a/drivers/bus/brcmstb_gisb.c b/drivers/bus/brcmstb_gisb.c
index e7ccd21a45c9..46de8dc39eb4 100644
--- a/drivers/bus/brcmstb_gisb.c
+++ b/drivers/bus/brcmstb_gisb.c
@@ -25,26 +25,72 @@
#include <linux/bitops.h>
#include <linux/pm.h>
+#ifdef CONFIG_ARM
#include <asm/bug.h>
#include <asm/signal.h>
+#endif
-#define ARB_TIMER 0x008
-#define ARB_ERR_CAP_CLR 0x7e4
#define ARB_ERR_CAP_CLEAR (1 << 0)
-#define ARB_ERR_CAP_HI_ADDR 0x7e8
-#define ARB_ERR_CAP_ADDR 0x7ec
-#define ARB_ERR_CAP_DATA 0x7f0
-#define ARB_ERR_CAP_STATUS 0x7f4
#define ARB_ERR_CAP_STATUS_TIMEOUT (1 << 12)
#define ARB_ERR_CAP_STATUS_TEA (1 << 11)
#define ARB_ERR_CAP_STATUS_BS_SHIFT (1 << 2)
#define ARB_ERR_CAP_STATUS_BS_MASK 0x3c
#define ARB_ERR_CAP_STATUS_WRITE (1 << 1)
#define ARB_ERR_CAP_STATUS_VALID (1 << 0)
-#define ARB_ERR_CAP_MASTER 0x7f8
+
+enum {
+ ARB_TIMER,
+ ARB_ERR_CAP_CLR,
+ ARB_ERR_CAP_HI_ADDR,
+ ARB_ERR_CAP_ADDR,
+ ARB_ERR_CAP_DATA,
+ ARB_ERR_CAP_STATUS,
+ ARB_ERR_CAP_MASTER,
+};
+
+static const int gisb_offsets_bcm7038[] = {
+ [ARB_TIMER] = 0x00c,
+ [ARB_ERR_CAP_CLR] = 0x0c4,
+ [ARB_ERR_CAP_HI_ADDR] = -1,
+ [ARB_ERR_CAP_ADDR] = 0x0c8,
+ [ARB_ERR_CAP_DATA] = 0x0cc,
+ [ARB_ERR_CAP_STATUS] = 0x0d0,
+ [ARB_ERR_CAP_MASTER] = -1,
+};
+
+static const int gisb_offsets_bcm7400[] = {
+ [ARB_TIMER] = 0x00c,
+ [ARB_ERR_CAP_CLR] = 0x0c8,
+ [ARB_ERR_CAP_HI_ADDR] = -1,
+ [ARB_ERR_CAP_ADDR] = 0x0cc,
+ [ARB_ERR_CAP_DATA] = 0x0d0,
+ [ARB_ERR_CAP_STATUS] = 0x0d4,
+ [ARB_ERR_CAP_MASTER] = 0x0d8,
+};
+
+static const int gisb_offsets_bcm7435[] = {
+ [ARB_TIMER] = 0x00c,
+ [ARB_ERR_CAP_CLR] = 0x168,
+ [ARB_ERR_CAP_HI_ADDR] = -1,
+ [ARB_ERR_CAP_ADDR] = 0x16c,
+ [ARB_ERR_CAP_DATA] = 0x170,
+ [ARB_ERR_CAP_STATUS] = 0x174,
+ [ARB_ERR_CAP_MASTER] = 0x178,
+};
+
+static const int gisb_offsets_bcm7445[] = {
+ [ARB_TIMER] = 0x008,
+ [ARB_ERR_CAP_CLR] = 0x7e4,
+ [ARB_ERR_CAP_HI_ADDR] = 0x7e8,
+ [ARB_ERR_CAP_ADDR] = 0x7ec,
+ [ARB_ERR_CAP_DATA] = 0x7f0,
+ [ARB_ERR_CAP_STATUS] = 0x7f4,
+ [ARB_ERR_CAP_MASTER] = 0x7f8,
+};
struct brcmstb_gisb_arb_device {
void __iomem *base;
+ const int *gisb_offsets;
struct mutex lock;
struct list_head next;
u32 valid_mask;
@@ -54,6 +100,26 @@ struct brcmstb_gisb_arb_device {
static LIST_HEAD(brcmstb_gisb_arb_device_list);
+static u32 gisb_read(struct brcmstb_gisb_arb_device *gdev, int reg)
+{
+ int offset = gdev->gisb_offsets[reg];
+
+ /* return 1 if the hardware doesn't have ARB_ERR_CAP_MASTER */
+ if (offset == -1)
+ return 1;
+
+ return ioread32(gdev->base + offset);
+}
+
+static void gisb_write(struct brcmstb_gisb_arb_device *gdev, u32 val, int reg)
+{
+ int offset = gdev->gisb_offsets[reg];
+
+ if (offset == -1)
+ return;
+ iowrite32(val, gdev->base + reg);
+}
+
static ssize_t gisb_arb_get_timeout(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -63,7 +129,7 @@ static ssize_t gisb_arb_get_timeout(struct device *dev,
u32 timeout;
mutex_lock(&gdev->lock);
- timeout = ioread32(gdev->base + ARB_TIMER);
+ timeout = gisb_read(gdev, ARB_TIMER);
mutex_unlock(&gdev->lock);
return sprintf(buf, "%d", timeout);
@@ -85,7 +151,7 @@ static ssize_t gisb_arb_set_timeout(struct device *dev,
return -EINVAL;
mutex_lock(&gdev->lock);
- iowrite32(val, gdev->base + ARB_TIMER);
+ gisb_write(gdev, val, ARB_TIMER);
mutex_unlock(&gdev->lock);
return count;
@@ -112,18 +178,18 @@ static int brcmstb_gisb_arb_decode_addr(struct brcmstb_gisb_arb_device *gdev,
const char *m_name;
char m_fmt[11];
- cap_status = ioread32(gdev->base + ARB_ERR_CAP_STATUS);
+ cap_status = gisb_read(gdev, ARB_ERR_CAP_STATUS);
/* Invalid captured address, bail out */
if (!(cap_status & ARB_ERR_CAP_STATUS_VALID))
return 1;
/* Read the address and master */
- arb_addr = ioread32(gdev->base + ARB_ERR_CAP_ADDR) & 0xffffffff;
+ arb_addr = gisb_read(gdev, ARB_ERR_CAP_ADDR) & 0xffffffff;
#if (IS_ENABLED(CONFIG_PHYS_ADDR_T_64BIT))
- arb_addr |= (u64)ioread32(gdev->base + ARB_ERR_CAP_HI_ADDR) << 32;
+ arb_addr |= (u64)gisb_read(gdev, ARB_ERR_CAP_HI_ADDR) << 32;
#endif
- master = ioread32(gdev->base + ARB_ERR_CAP_MASTER);
+ master = gisb_read(gdev, ARB_ERR_CAP_MASTER);
m_name = brcmstb_gisb_master_to_str(gdev, master);
if (!m_name) {
@@ -138,11 +204,12 @@ static int brcmstb_gisb_arb_decode_addr(struct brcmstb_gisb_arb_device *gdev,
m_name);
/* clear the GISB error */
- iowrite32(ARB_ERR_CAP_CLEAR, gdev->base + ARB_ERR_CAP_CLR);
+ gisb_write(gdev, ARB_ERR_CAP_CLEAR, ARB_ERR_CAP_CLR);
return 0;
}
+#ifdef CONFIG_ARM
static int brcmstb_bus_error_handler(unsigned long addr, unsigned int fsr,
struct pt_regs *regs)
{
@@ -161,6 +228,7 @@ static int brcmstb_bus_error_handler(unsigned long addr, unsigned int fsr,
return ret;
}
+#endif
static irqreturn_t brcmstb_gisb_timeout_handler(int irq, void *dev_id)
{
@@ -188,10 +256,20 @@ static struct attribute_group gisb_arb_sysfs_attr_group = {
.attrs = gisb_arb_sysfs_attrs,
};
-static int brcmstb_gisb_arb_probe(struct platform_device *pdev)
+static const struct of_device_id brcmstb_gisb_arb_of_match[] = {
+ { .compatible = "brcm,gisb-arb", .data = gisb_offsets_bcm7445 },
+ { .compatible = "brcm,bcm7445-gisb-arb", .data = gisb_offsets_bcm7445 },
+ { .compatible = "brcm,bcm7435-gisb-arb", .data = gisb_offsets_bcm7435 },
+ { .compatible = "brcm,bcm7400-gisb-arb", .data = gisb_offsets_bcm7400 },
+ { .compatible = "brcm,bcm7038-gisb-arb", .data = gisb_offsets_bcm7038 },
+ { },
+};
+
+static int __init brcmstb_gisb_arb_probe(struct platform_device *pdev)
{
struct device_node *dn = pdev->dev.of_node;
struct brcmstb_gisb_arb_device *gdev;
+ const struct of_device_id *of_id;
struct resource *r;
int err, timeout_irq, tea_irq;
unsigned int num_masters, j = 0;
@@ -212,6 +290,13 @@ static int brcmstb_gisb_arb_probe(struct platform_device *pdev)
if (IS_ERR(gdev->base))
return PTR_ERR(gdev->base);
+ of_id = of_match_node(brcmstb_gisb_arb_of_match, dn);
+ if (!of_id) {
+ pr_err("failed to look up compatible string\n");
+ return -EINVAL;
+ }
+ gdev->gisb_offsets = of_id->data;
+
err = devm_request_irq(&pdev->dev, timeout_irq,
brcmstb_gisb_timeout_handler, 0, pdev->name,
gdev);
@@ -257,8 +342,10 @@ static int brcmstb_gisb_arb_probe(struct platform_device *pdev)
list_add_tail(&gdev->next, &brcmstb_gisb_arb_device_list);
+#ifdef CONFIG_ARM
hook_fault_code(22, brcmstb_bus_error_handler, SIGBUS, 0,
"imprecise external abort");
+#endif
dev_info(&pdev->dev, "registered mem: %p, irqs: %d, %d\n",
gdev->base, timeout_irq, tea_irq);
@@ -272,7 +359,7 @@ static int brcmstb_gisb_arb_suspend(struct device *dev)
struct platform_device *pdev = to_platform_device(dev);
struct brcmstb_gisb_arb_device *gdev = platform_get_drvdata(pdev);
- gdev->saved_timeout = ioread32(gdev->base + ARB_TIMER);
+ gdev->saved_timeout = gisb_read(gdev, ARB_TIMER);
return 0;
}
@@ -285,7 +372,7 @@ static int brcmstb_gisb_arb_resume_noirq(struct device *dev)
struct platform_device *pdev = to_platform_device(dev);
struct brcmstb_gisb_arb_device *gdev = platform_get_drvdata(pdev);
- iowrite32(gdev->saved_timeout, gdev->base + ARB_TIMER);
+ gisb_write(gdev, gdev->saved_timeout, ARB_TIMER);
return 0;
}
@@ -299,13 +386,7 @@ static const struct dev_pm_ops brcmstb_gisb_arb_pm_ops = {
.resume_noirq = brcmstb_gisb_arb_resume_noirq,
};
-static const struct of_device_id brcmstb_gisb_arb_of_match[] = {
- { .compatible = "brcm,gisb-arb" },
- { },
-};
-
static struct platform_driver brcmstb_gisb_arb_driver = {
- .probe = brcmstb_gisb_arb_probe,
.driver = {
.name = "brcm-gisb-arb",
.owner = THIS_MODULE,
@@ -316,7 +397,8 @@ static struct platform_driver brcmstb_gisb_arb_driver = {
static int __init brcm_gisb_driver_init(void)
{
- return platform_driver_register(&brcmstb_gisb_arb_driver);
+ return platform_driver_probe(&brcmstb_gisb_arb_driver,
+ brcmstb_gisb_arb_probe);
}
module_init(brcm_gisb_driver_init);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 12:08:20 +0000