Input: pxa27x_keypad - use device resources for I/O memory mapping and IRQ
1. use ioremap() for registers access, this improves the portability of the driver (e.g. same IP on different processor with different I/O memory range), and make it possible to remove those registers definition in pxa-regs.h as PXA is undergoing a clean-up of that header file 2. use device specific IRQ instead of hardcoded IRQ_KEYPAD, same reason as above 3. clean up the error handling path in _probe() 4. remove DRIVER_NAME and use pdev->name when necessary, we don't actually need a constant string literals Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
parent
62059d9e91
commit
9c60debd2a
1 changed files with 125 additions and 35 deletions
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@ -31,25 +31,71 @@
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#include <asm/mach/map.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/irqs.h>
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#include <asm/arch/pxa27x_keypad.h>
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#define DRIVER_NAME "pxa27x-keypad"
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/*
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* Keypad Controller registers
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*/
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#define KPC 0x0000 /* Keypad Control register */
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#define KPDK 0x0008 /* Keypad Direct Key register */
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#define KPREC 0x0010 /* Keypad Rotary Encoder register */
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#define KPMK 0x0018 /* Keypad Matrix Key register */
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#define KPAS 0x0020 /* Keypad Automatic Scan register */
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/* Keypad Automatic Scan Multiple Key Presser register 0-3 */
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#define KPASMKP0 0x0028
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#define KPASMKP1 0x0030
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#define KPASMKP2 0x0038
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#define KPASMKP3 0x0040
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#define KPKDI 0x0048
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/* bit definitions */
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#define KPC_MKRN(n) ((((n) & 0x7) - 1) << 26) /* matrix key row number */
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#define KPC_MKCN(n) ((((n) & 0x7) - 1) << 23) /* matrix key column number */
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#define KPC_DKN(n) ((((n) & 0x7) - 1) << 6) /* direct key number */
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#define KPC_AS (0x1 << 30) /* Automatic Scan bit */
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#define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */
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#define KPC_MI (0x1 << 22) /* Matrix interrupt bit */
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#define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */
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#define KPC_MS(n) (0x1 << (13 + (n))) /* Matrix scan line 'n' */
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#define KPC_MS_ALL (0xff << 13)
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#define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */
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#define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */
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#define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */
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#define KPC_DI (0x1 << 5) /* Direct key interrupt bit */
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#define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */
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#define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */
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#define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */
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#define KPC_DE (0x1 << 1) /* Direct Keypad Enable */
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#define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */
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#define KPDK_DKP (0x1 << 31)
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#define KPDK_DK(n) ((n) & 0xff)
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#define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
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#define KPAS_RP(n) (((n) >> 4) & 0xf)
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#define KPAS_CP(n) ((n) & 0xf)
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#define KPREC_OF1 (0x1 << 31)
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#define kPREC_UF1 (0x1 << 30)
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#define KPREC_OF0 (0x1 << 15)
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#define KPREC_UF0 (0x1 << 14)
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#define KPREC_RECOUNT0(n) ((n) & 0xff)
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#define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff)
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#define KPMK_MKP (0x1 << 31)
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#define KPAS_SO (0x1 << 31)
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#define KPASMKPx_SO (0x1 << 31)
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#define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
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#define KPAS_RP(n) (((n) >> 4) & 0xf)
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#define KPAS_CP(n) ((n) & 0xf)
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#define KPASMKP_MKC_MASK (0xff)
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#define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
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#define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off))
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#define MAX_MATRIX_KEY_NUM (8 * 8)
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struct pxa27x_keypad {
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@ -57,6 +103,7 @@ struct pxa27x_keypad {
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struct clk *clk;
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struct input_dev *input_dev;
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void __iomem *mmio_base;
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/* matrix key code map */
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unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM];
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@ -120,7 +167,7 @@ static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
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struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
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int row, col, num_keys_pressed = 0;
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uint32_t new_state[MAX_MATRIX_KEY_COLS];
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uint32_t kpas = KPAS;
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uint32_t kpas = keypad_readl(KPAS);
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num_keys_pressed = KPAS_MUKP(kpas);
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@ -143,10 +190,10 @@ static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
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}
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if (num_keys_pressed > 1) {
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uint32_t kpasmkp0 = KPASMKP0;
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uint32_t kpasmkp1 = KPASMKP1;
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uint32_t kpasmkp2 = KPASMKP2;
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uint32_t kpasmkp3 = KPASMKP3;
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uint32_t kpasmkp0 = keypad_readl(KPASMKP0);
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uint32_t kpasmkp1 = keypad_readl(KPASMKP1);
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uint32_t kpasmkp2 = keypad_readl(KPASMKP2);
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uint32_t kpasmkp3 = keypad_readl(KPASMKP3);
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new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK;
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new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK;
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@ -218,8 +265,8 @@ static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
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uint32_t kprec;
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/* read and reset to default count value */
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kprec = KPREC;
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KPREC = DEFAULT_KPREC;
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kprec = keypad_readl(KPREC);
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keypad_writel(KPREC, DEFAULT_KPREC);
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if (pdata->enable_rotary0)
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report_rotary_event(keypad, 0, rotary_delta(kprec));
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@ -235,7 +282,7 @@ static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
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uint32_t kpdk, bits_changed;
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int i;
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kpdk = KPDK;
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kpdk = keypad_readl(KPDK);
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if (pdata->enable_rotary0 || pdata->enable_rotary1)
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pxa27x_keypad_scan_rotary(keypad);
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@ -262,7 +309,7 @@ static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
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static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
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{
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struct pxa27x_keypad *keypad = dev_id;
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unsigned long kpc = KPC;
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unsigned long kpc = keypad_readl(KPC);
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if (kpc & KPC_DI)
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pxa27x_keypad_scan_direct(keypad);
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@ -308,8 +355,8 @@ static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
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if (direct_key_num)
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kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num);
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KPC = kpc | KPC_RE_ZERO_DEB;
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KPREC = DEFAULT_KPREC;
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keypad_writel(KPC, kpc | KPC_RE_ZERO_DEB);
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keypad_writel(KPREC, DEFAULT_KPREC);
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}
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static int pxa27x_keypad_open(struct input_dev *dev)
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@ -362,11 +409,14 @@ static int pxa27x_keypad_resume(struct platform_device *pdev)
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#define pxa27x_keypad_resume NULL
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#endif
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#define res_size(res) ((res)->end - (res)->start + 1)
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static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
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{
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struct pxa27x_keypad *keypad;
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struct input_dev *input_dev;
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int error;
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struct resource *res;
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int irq, error;
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keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL);
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if (keypad == NULL) {
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@ -381,11 +431,39 @@ static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
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goto failed_free;
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}
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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dev_err(&pdev->dev, "failed to get keypad irq\n");
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error = -ENXIO;
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goto failed_free;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (res == NULL) {
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dev_err(&pdev->dev, "failed to get I/O memory\n");
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error = -ENXIO;
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goto failed_free;
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}
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res = request_mem_region(res->start, res_size(res), pdev->name);
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if (res == NULL) {
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dev_err(&pdev->dev, "failed to request I/O memory\n");
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error = -EBUSY;
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goto failed_free;
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}
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keypad->mmio_base = ioremap(res->start, res_size(res));
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if (keypad->mmio_base == NULL) {
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dev_err(&pdev->dev, "failed to remap I/O memory\n");
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error = -ENXIO;
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goto failed_free_mem;
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}
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keypad->clk = clk_get(&pdev->dev, "KBDCLK");
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if (IS_ERR(keypad->clk)) {
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dev_err(&pdev->dev, "failed to get keypad clock\n");
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error = PTR_ERR(keypad->clk);
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goto failed_free;
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goto failed_free_io;
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}
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/* Create and register the input driver. */
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@ -396,7 +474,7 @@ static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
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goto failed_put_clk;
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}
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input_dev->name = DRIVER_NAME;
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input_dev->name = pdev->name;
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input_dev->id.bustype = BUS_HOST;
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input_dev->open = pxa27x_keypad_open;
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input_dev->close = pxa27x_keypad_close;
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@ -409,30 +487,35 @@ static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
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BIT_MASK(EV_REL);
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pxa27x_keypad_build_keycode(keypad);
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error = request_irq(IRQ_KEYPAD, pxa27x_keypad_irq_handler, IRQF_DISABLED,
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DRIVER_NAME, keypad);
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if (error) {
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printk(KERN_ERR "Cannot request keypad IRQ\n");
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goto err_free_dev;
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}
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platform_set_drvdata(pdev, keypad);
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error = request_irq(irq, pxa27x_keypad_irq_handler, IRQF_DISABLED,
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pdev->name, keypad);
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if (error) {
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dev_err(&pdev->dev, "failed to request IRQ\n");
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goto failed_free_dev;
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}
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/* Register the input device */
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error = input_register_device(input_dev);
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if (error)
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goto err_free_irq;
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if (error) {
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dev_err(&pdev->dev, "failed to register input device\n");
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goto failed_free_irq;
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}
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return 0;
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err_free_irq:
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failed_free_irq:
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free_irq(irq, pdev);
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platform_set_drvdata(pdev, NULL);
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free_irq(IRQ_KEYPAD, pdev);
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err_free_dev:
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failed_free_dev:
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input_free_device(input_dev);
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failed_put_clk:
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clk_put(keypad->clk);
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failed_free_io:
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iounmap(keypad->mmio_base);
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failed_free_mem:
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release_mem_region(res->start, res_size(res));
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failed_free:
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kfree(keypad);
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return error;
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@ -441,13 +524,20 @@ failed_free:
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static int __devexit pxa27x_keypad_remove(struct platform_device *pdev)
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{
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struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
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struct resource *res;
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free_irq(IRQ_KEYPAD, pdev);
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free_irq(platform_get_irq(pdev, 0), pdev);
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clk_disable(keypad->clk);
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clk_put(keypad->clk);
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input_unregister_device(keypad->input_dev);
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input_free_device(keypad->input_dev);
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iounmap(keypad->mmio_base);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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release_mem_region(res->start, res_size(res));
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platform_set_drvdata(pdev, NULL);
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kfree(keypad);
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@ -460,7 +550,7 @@ static struct platform_driver pxa27x_keypad_driver = {
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.suspend = pxa27x_keypad_suspend,
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.resume = pxa27x_keypad_resume,
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.driver = {
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.name = DRIVER_NAME,
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.name = "pxa27x-keypad",
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},
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};
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