From ea4c39beace859139bc184a1aebdccdc12c04a2e Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Wed, 31 Jul 2013 14:56:31 +0400 Subject: serial: sccnxp: Using structure for each supported IC instead of switch in probe This patch replaces switch in probe function to constant structure for each supported IC. This makes code a bit smaller and cleaner and helps adding DT support to the driver in the future. Signed-off-by: Alexander Shiyan Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sccnxp.c | 272 ++++++++++++++++++++------------------------ 1 file changed, 124 insertions(+), 148 deletions(-) (limited to 'drivers/tty/serial/sccnxp.c') diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index 81e7047..49e9bbf 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -95,16 +95,17 @@ #define MCTRL_IBIT(cfg, sig) ((((cfg) >> (sig)) & 0xf) - LINE_IP0) #define MCTRL_OBIT(cfg, sig) ((((cfg) >> (sig)) & 0xf) - LINE_OP0) -/* Supported chip types */ -enum { - SCCNXP_TYPE_SC2681 = 2681, - SCCNXP_TYPE_SC2691 = 2691, - SCCNXP_TYPE_SC2692 = 2692, - SCCNXP_TYPE_SC2891 = 2891, - SCCNXP_TYPE_SC2892 = 2892, - SCCNXP_TYPE_SC28202 = 28202, - SCCNXP_TYPE_SC68681 = 68681, - SCCNXP_TYPE_SC68692 = 68692, +#define SCCNXP_HAVE_IO 0x00000001 +#define SCCNXP_HAVE_MR0 0x00000002 + +struct sccnxp_chip { + const char *name; + unsigned int nr; + unsigned long freq_min; + unsigned long freq_std; + unsigned long freq_max; + unsigned int flags; + unsigned int fifosize; }; struct sccnxp_port { @@ -112,16 +113,10 @@ struct sccnxp_port { struct uart_port port[SCCNXP_MAX_UARTS]; bool opened[SCCNXP_MAX_UARTS]; - const char *name; int irq; - u8 imr; - u8 addr_mask; - int freq_std; - int flags; -#define SCCNXP_HAVE_IO 0x00000001 -#define SCCNXP_HAVE_MR0 0x00000002 + struct sccnxp_chip *chip; #ifdef CONFIG_SERIAL_SCCNXP_CONSOLE struct console console; @@ -137,29 +132,94 @@ struct sccnxp_port { struct regulator *regulator; }; -static inline u8 sccnxp_raw_read(void __iomem *base, u8 reg, u8 shift) -{ - return readb(base + (reg << shift)); -} +static const struct sccnxp_chip sc2681 = { + .name = "SC2681", + .nr = 2, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = SCCNXP_HAVE_IO, + .fifosize = 3, +}; -static inline void sccnxp_raw_write(void __iomem *base, u8 reg, u8 shift, u8 v) -{ - writeb(v, base + (reg << shift)); -} +static const struct sccnxp_chip sc2691 = { + .name = "SC2691", + .nr = 1, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = 0, + .fifosize = 3, +}; + +static const struct sccnxp_chip sc2692 = { + .name = "SC2692", + .nr = 2, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = SCCNXP_HAVE_IO, + .fifosize = 3, +}; + +static const struct sccnxp_chip sc2891 = { + .name = "SC2891", + .nr = 1, + .freq_min = 100000, + .freq_std = 3686400, + .freq_max = 8000000, + .flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0, + .fifosize = 16, +}; + +static const struct sccnxp_chip sc2892 = { + .name = "SC2892", + .nr = 2, + .freq_min = 100000, + .freq_std = 3686400, + .freq_max = 8000000, + .flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0, + .fifosize = 16, +}; + +static const struct sccnxp_chip sc28202 = { + .name = "SC28202", + .nr = 2, + .freq_min = 1000000, + .freq_std = 14745600, + .freq_max = 50000000, + .flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0, + .fifosize = 256, +}; + +static const struct sccnxp_chip sc68681 = { + .name = "SC68681", + .nr = 2, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = SCCNXP_HAVE_IO, + .fifosize = 3, +}; + +static const struct sccnxp_chip sc68692 = { + .name = "SC68692", + .nr = 2, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = SCCNXP_HAVE_IO, + .fifosize = 3, +}; static inline u8 sccnxp_read(struct uart_port *port, u8 reg) { - struct sccnxp_port *s = dev_get_drvdata(port->dev); - - return sccnxp_raw_read(port->membase, reg & s->addr_mask, - port->regshift); + return readb(port->membase + (reg << port->regshift)); } static inline void sccnxp_write(struct uart_port *port, u8 reg, u8 v) { - struct sccnxp_port *s = dev_get_drvdata(port->dev); - - sccnxp_raw_write(port->membase, reg & s->addr_mask, port->regshift, v); + writeb(v, port->membase + (reg << port->regshift)); } static inline u8 sccnxp_port_read(struct uart_port *port, u8 reg) @@ -225,13 +285,14 @@ static int sccnxp_set_baud(struct uart_port *port, int baud) { struct sccnxp_port *s = dev_get_drvdata(port->dev); int div_std, tmp_baud, bestbaud = baud, besterr = -1; + struct sccnxp_chip *chip = s->chip; u8 i, acr = 0, csr = 0, mr0 = 0; /* Find best baud from table */ for (i = 0; baud_std[i].baud && besterr; i++) { - if (baud_std[i].mr0 && !(s->flags & SCCNXP_HAVE_MR0)) + if (baud_std[i].mr0 && !(chip->flags & SCCNXP_HAVE_MR0)) continue; - div_std = DIV_ROUND_CLOSEST(s->freq_std, baud_std[i].baud); + div_std = DIV_ROUND_CLOSEST(chip->freq_std, baud_std[i].baud); tmp_baud = DIV_ROUND_CLOSEST(port->uartclk, div_std); if (!sccnxp_update_best_err(baud, tmp_baud, &besterr)) { acr = baud_std[i].acr; @@ -241,7 +302,7 @@ static int sccnxp_set_baud(struct uart_port *port, int baud) } } - if (s->flags & SCCNXP_HAVE_MR0) { + if (chip->flags & SCCNXP_HAVE_MR0) { /* Enable FIFO, set half level for TX */ mr0 |= MR0_FIFO | MR0_TXLVL; /* Update MR0 */ @@ -364,7 +425,7 @@ static void sccnxp_handle_tx(struct uart_port *port) sccnxp_disable_irq(port, IMR_TXRDY); /* Set direction to input */ - if (s->flags & SCCNXP_HAVE_IO) + if (s->chip->flags & SCCNXP_HAVE_IO) sccnxp_set_bit(port, DIR_OP, 0); } return; @@ -438,7 +499,7 @@ static void sccnxp_start_tx(struct uart_port *port) spin_lock_irqsave(&s->lock, flags); /* Set direction to output */ - if (s->flags & SCCNXP_HAVE_IO) + if (s->chip->flags & SCCNXP_HAVE_IO) sccnxp_set_bit(port, DIR_OP, 1); sccnxp_enable_irq(port, IMR_TXRDY); @@ -484,7 +545,7 @@ static void sccnxp_set_mctrl(struct uart_port *port, unsigned int mctrl) struct sccnxp_port *s = dev_get_drvdata(port->dev); unsigned long flags; - if (!(s->flags & SCCNXP_HAVE_IO)) + if (!(s->chip->flags & SCCNXP_HAVE_IO)) return; spin_lock_irqsave(&s->lock, flags); @@ -502,7 +563,7 @@ static unsigned int sccnxp_get_mctrl(struct uart_port *port) struct sccnxp_port *s = dev_get_drvdata(port->dev); unsigned int mctrl = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; - if (!(s->flags & SCCNXP_HAVE_IO)) + if (!(s->chip->flags & SCCNXP_HAVE_IO)) return mctrl; spin_lock_irqsave(&s->lock, flags); @@ -618,7 +679,7 @@ static void sccnxp_set_termios(struct uart_port *port, /* Setup baudrate */ baud = uart_get_baud_rate(port, termios, old, 50, - (s->flags & SCCNXP_HAVE_MR0) ? + (s->chip->flags & SCCNXP_HAVE_MR0) ? 230400 : 38400); baud = sccnxp_set_baud(port, baud); @@ -642,7 +703,7 @@ static int sccnxp_startup(struct uart_port *port) spin_lock_irqsave(&s->lock, flags); - if (s->flags & SCCNXP_HAVE_IO) { + if (s->chip->flags & SCCNXP_HAVE_IO) { /* Outputs are controlled manually */ sccnxp_write(port, SCCNXP_OPCR_REG, 0); } @@ -682,7 +743,7 @@ static void sccnxp_shutdown(struct uart_port *port) sccnxp_port_write(port, SCCNXP_CR_REG, CR_RX_DISABLE | CR_TX_DISABLE); /* Leave direction to input */ - if (s->flags & SCCNXP_HAVE_IO) + if (s->chip->flags & SCCNXP_HAVE_IO) sccnxp_set_bit(port, DIR_OP, 0); spin_unlock_irqrestore(&s->lock, flags); @@ -692,7 +753,7 @@ static const char *sccnxp_type(struct uart_port *port) { struct sccnxp_port *s = dev_get_drvdata(port->dev); - return (port->type == PORT_SC26XX) ? s->name : NULL; + return (port->type == PORT_SC26XX) ? s->chip->name : NULL; } static void sccnxp_release_port(struct uart_port *port) @@ -779,12 +840,24 @@ static int sccnxp_console_setup(struct console *co, char *options) } #endif +static const struct platform_device_id sccnxp_id_table[] = { + { .name = "sc2681", .driver_data = (kernel_ulong_t)&sc2681, }, + { .name = "sc2691", .driver_data = (kernel_ulong_t)&sc2691, }, + { .name = "sc2692", .driver_data = (kernel_ulong_t)&sc2692, }, + { .name = "sc2891", .driver_data = (kernel_ulong_t)&sc2891, }, + { .name = "sc2892", .driver_data = (kernel_ulong_t)&sc2892, }, + { .name = "sc28202", .driver_data = (kernel_ulong_t)&sc28202, }, + { .name = "sc68681", .driver_data = (kernel_ulong_t)&sc68681, }, + { .name = "sc68692", .driver_data = (kernel_ulong_t)&sc68692, }, + { } +}; +MODULE_DEVICE_TABLE(platform, sccnxp_id_table); + static int sccnxp_probe(struct platform_device *pdev) { struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - int chiptype = pdev->id_entry->driver_data; struct sccnxp_pdata *pdata = dev_get_platdata(&pdev->dev); - int i, ret, fifosize, freq_min, freq_max, uartclk; + int i, ret, uartclk; struct sccnxp_port *s; void __iomem *membase; struct clk *clk; @@ -802,92 +875,7 @@ static int sccnxp_probe(struct platform_device *pdev) spin_lock_init(&s->lock); - /* Individual chip settings */ - switch (chiptype) { - case SCCNXP_TYPE_SC2681: - s->name = "SC2681"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - case SCCNXP_TYPE_SC2691: - s->name = "SC2691"; - s->uart.nr = 1; - s->freq_std = 3686400; - s->addr_mask = 0x07; - s->flags = 0; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - case SCCNXP_TYPE_SC2692: - s->name = "SC2692"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - case SCCNXP_TYPE_SC2891: - s->name = "SC2891"; - s->uart.nr = 1; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0; - fifosize = 16; - freq_min = 100000; - freq_max = 8000000; - break; - case SCCNXP_TYPE_SC2892: - s->name = "SC2892"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0; - fifosize = 16; - freq_min = 100000; - freq_max = 8000000; - break; - case SCCNXP_TYPE_SC28202: - s->name = "SC28202"; - s->uart.nr = 2; - s->freq_std = 14745600; - s->addr_mask = 0x7f; - s->flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0; - fifosize = 256; - freq_min = 1000000; - freq_max = 50000000; - break; - case SCCNXP_TYPE_SC68681: - s->name = "SC68681"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - case SCCNXP_TYPE_SC68692: - s->name = "SC68692"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - default: - dev_err(&pdev->dev, "Unsupported chip type %i\n", chiptype); - return -ENOTSUPP; - } + s->chip = (struct sccnxp_chip *)pdev->id_entry->driver_data; s->regulator = devm_regulator_get(&pdev->dev, "vcc"); if (!IS_ERR(s->regulator)) { @@ -907,12 +895,12 @@ static int sccnxp_probe(struct platform_device *pdev) goto err_out; } dev_notice(&pdev->dev, "Using default clock frequency\n"); - uartclk = s->freq_std; + uartclk = s->chip->freq_std; } else uartclk = clk_get_rate(clk); /* Check input frequency */ - if ((uartclk < freq_min) || (uartclk > freq_max)) { + if ((uartclk < s->chip->freq_min) || (uartclk > s->chip->freq_max)) { dev_err(&pdev->dev, "Frequency out of bounds\n"); ret = -EINVAL; goto err_out; @@ -940,6 +928,7 @@ static int sccnxp_probe(struct platform_device *pdev) s->uart.dev_name = "ttySC"; s->uart.major = SCCNXP_MAJOR; s->uart.minor = SCCNXP_MINOR; + s->uart.nr = s->chip->nr; #ifdef CONFIG_SERIAL_SCCNXP_CONSOLE s->uart.cons = &s->console; s->uart.cons->device = uart_console_device; @@ -961,7 +950,7 @@ static int sccnxp_probe(struct platform_device *pdev) s->port[i].dev = &pdev->dev; s->port[i].irq = s->irq; s->port[i].type = PORT_SC26XX; - s->port[i].fifosize = fifosize; + s->port[i].fifosize = s->chip->fifosize; s->port[i].flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; s->port[i].iotype = UPIO_MEM; s->port[i].mapbase = res->start; @@ -971,7 +960,7 @@ static int sccnxp_probe(struct platform_device *pdev) s->port[i].ops = &sccnxp_ops; uart_add_one_port(&s->uart, &s->port[i]); /* Set direction to input */ - if (s->flags & SCCNXP_HAVE_IO) + if (s->chip->flags & SCCNXP_HAVE_IO) sccnxp_set_bit(&s->port[i], DIR_OP, 0); } @@ -1025,19 +1014,6 @@ static int sccnxp_remove(struct platform_device *pdev) return 0; } -static const struct platform_device_id sccnxp_id_table[] = { - { "sc2681", SCCNXP_TYPE_SC2681 }, - { "sc2691", SCCNXP_TYPE_SC2691 }, - { "sc2692", SCCNXP_TYPE_SC2692 }, - { "sc2891", SCCNXP_TYPE_SC2891 }, - { "sc2892", SCCNXP_TYPE_SC2892 }, - { "sc28202", SCCNXP_TYPE_SC28202 }, - { "sc68681", SCCNXP_TYPE_SC68681 }, - { "sc68692", SCCNXP_TYPE_SC68692 }, - { }, -}; -MODULE_DEVICE_TABLE(platform, sccnxp_id_table); - static struct platform_driver sccnxp_uart_driver = { .driver = { .name = SCCNXP_NAME, -- cgit v1.1