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soc: ixp4xx: qmgr: Pass resources 

Instead of using hardcoded base address implicitly
obtained through <linux/io.h>, pass the physical base
for the QMGR block as a memory resource and remap
it in the driver.

Also pass the two IRQs as resources and obtain them
in the driver.

Use devm_* accessors and simplify the error path in the
process. Drop memory region request as this is done by
the devm_ioremap* functions.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2019-02-10 20:20:10 +01:00
parent 6b39031954
commit ecc133c6da
3 changed files with 55 additions and 43 deletions
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25
arch/arm/mach-ixp4xx/common.c
View File

@ -66,11 +66,6 @@ static struct map_desc ixp4xx_io_desc[] __initdata = {
.pfn = __phys_to_pfn(IXP4XX_PCI_CFG_BASE_PHYS),
.length = IXP4XX_PCI_CFG_REGION_SIZE,
.type = MT_DEVICE
}, { /* Queue Manager */
.virtual = (unsigned long)IXP4XX_QMGR_BASE_VIRT,
.pfn = __phys_to_pfn(IXP4XX_QMGR_BASE_PHYS),
.length = IXP4XX_QMGR_REGION_SIZE,
.type = MT_DEVICE
},
};
@ -176,9 +171,29 @@ static struct platform_device ixp4xx_npe_device = {
.resource = ixp4xx_npe_resources,
};
static struct resource ixp4xx_qmgr_resources[] = {
{
.start = IXP4XX_QMGR_BASE_PHYS,
.end = IXP4XX_QMGR_BASE_PHYS + 0x3fff,
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_IXP4XX_QM1,
.end = IRQ_IXP4XX_QM1,
.flags = IORESOURCE_IRQ,
},
{
.start = IRQ_IXP4XX_QM2,
.end = IRQ_IXP4XX_QM2,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device ixp4xx_qmgr_device = {
.name = "ixp4xx-qmgr",
.id = -1,
.num_resources = ARRAY_SIZE(ixp4xx_qmgr_resources),
.resource = ixp4xx_qmgr_resources,
};
static struct platform_device *ixp4xx_devices[] __initdata = {

2
arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
View File

@ -43,8 +43,6 @@
* Queue Manager
*/
#define IXP4XX_QMGR_BASE_PHYS 0x60000000
#define IXP4XX_QMGR_BASE_VIRT IOMEM(0xFEF15000)
#define IXP4XX_QMGR_REGION_SIZE 0x00004000
/*
* Peripheral space, including debug UART. Must be section-aligned so that

67
drivers/soc/ixp4xx/ixp4xx-qmgr.c
View File

@ -16,13 +16,9 @@
#include <linux/platform_device.h>
#include <linux/soc/ixp4xx/qmgr.h>
/* FIXME: get rid of these static assigments */
#define IRQ_IXP4XX_BASE 16
#define IRQ_IXP4XX_QM1 (IRQ_IXP4XX_BASE + 3)
#define IRQ_IXP4XX_QM2 (IRQ_IXP4XX_BASE + 4)
static struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
static struct resource *mem_res;
static struct qmgr_regs __iomem *qmgr_regs;
static int qmgr_irq_1;
static int qmgr_irq_2;
static spinlock_t qmgr_lock;
static u32 used_sram_bitmap[4]; /* 128 16-dword pages */
static void (*irq_handlers[QUEUES])(void *pdev);
@ -190,7 +186,7 @@ static irqreturn_t qmgr_irq2_a0(int irq, void *pdev)
static irqreturn_t qmgr_irq(int irq, void *pdev)
{
int i, half = (irq == IRQ_IXP4XX_QM1 ? 0 : 1);
int i, half = (irq == qmgr_irq_1 ? 0 : 1);
u32 req_bitmap = __raw_readl(&qmgr_regs->irqstat[half]);
if (!req_bitmap)
@ -381,12 +377,25 @@ static int ixp4xx_qmgr_probe(struct platform_device *pdev)
{
int i, err;
irq_handler_t handler1, handler2;
struct device *dev = &pdev->dev;
struct resource *res;
int irq1, irq2;
mem_res = request_mem_region(IXP4XX_QMGR_BASE_PHYS,
IXP4XX_QMGR_REGION_SIZE,
"IXP4xx Queue Manager");
if (mem_res == NULL)
return -EBUSY;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
qmgr_regs = devm_ioremap_resource(dev, res);
if (!qmgr_regs)
return -ENOMEM;
irq1 = platform_get_irq(pdev, 0);
if (irq1 <= 0)
return irq1 ? irq1 : -EINVAL;
qmgr_irq_1 = irq1;
irq2 = platform_get_irq(pdev, 1);
if (irq2 <= 0)
return irq2 ? irq2 : -EINVAL;
qmgr_irq_2 = irq2;
/* reset qmgr registers */
for (i = 0; i < 4; i++) {
@ -411,43 +420,33 @@ static int ixp4xx_qmgr_probe(struct platform_device *pdev)
} else
handler1 = handler2 = qmgr_irq;
err = request_irq(IRQ_IXP4XX_QM1, handler1, 0, "IXP4xx Queue Manager",
err = devm_request_irq(dev, irq1, handler1, 0, "IXP4xx Queue Manager",
NULL);
if (err) {
printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
IRQ_IXP4XX_QM1, err);
goto error_irq;
dev_err(dev, "failed to request IRQ%i (%i)\n",
irq1, err);
return err;
}
err = request_irq(IRQ_IXP4XX_QM2, handler2, 0, "IXP4xx Queue Manager",
err = devm_request_irq(dev, irq2, handler2, 0, "IXP4xx Queue Manager",
NULL);
if (err) {
printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
IRQ_IXP4XX_QM2, err);
goto error_irq2;
dev_err(dev, "failed to request IRQ%i (%i)\n",
irq2, err);
return err;
}
used_sram_bitmap[0] = 0xF; /* 4 first pages reserved for config */
spin_lock_init(&qmgr_lock);
printk(KERN_INFO "IXP4xx Queue Manager initialized.\n");
dev_info(dev, "IXP4xx Queue Manager initialized.\n");
return 0;
error_irq2:
free_irq(IRQ_IXP4XX_QM1, NULL);
error_irq:
release_mem_region(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
return err;
}
static int ixp4xx_qmgr_remove(struct platform_device *pdev)
{
free_irq(IRQ_IXP4XX_QM1, NULL);
free_irq(IRQ_IXP4XX_QM2, NULL);
synchronize_irq(IRQ_IXP4XX_QM1);
synchronize_irq(IRQ_IXP4XX_QM2);
release_mem_region(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
synchronize_irq(qmgr_irq_1);
synchronize_irq(qmgr_irq_2);
return 0;
}