diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-05-02 16:40:20 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-05-02 16:40:20 -0700 |
commit | 2142babac999a5ba169348892a8e3ac222bec7a4 (patch) | |
tree | eb862396a9864b34e2335b7cc0c6114c56f9ec1a /arch/arm/mach-davinci/serial.c | |
parent | bb402c4fb5bba4edf5b8c72b3db8760e60df4876 (diff) | |
parent | 0516e4643cd22fc9f535aef02ad1de66c382c93b (diff) |
Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm: (45 commits)
[ARM] 5489/1: ARM errata: Data written to the L2 cache can be overwritten with stale data
[ARM] 5490/1: ARM errata: Processor deadlock when a false hazard is created
[ARM] 5487/1: ARM errata: Stale prediction on replaced interworking branch
[ARM] 5488/1: ARM errata: Invalidation of the Instruction Cache operation can fail
davinci: DM644x: NAND: update partitioning
davinci: update DM644x support in preparation for more SoCs
davinci: DM644x: rename board file
davinci: update pin-multiplexing support
davinci: serial: generalize for more SoCs
davinci: DM355 IRQ Definitions
davinci: DM646x: add interrupt number and priorities
davinci: PSC: Clear bits in MDCTL reg before setting new bits
davinci: gpio bugfixes
davinci: add EDMA driver
davinci: timers: use clk_get_rate()
[ARM] pxa/littleton: add missing da9034 touchscreen support
[ARM] pxa/zylonite: configure GPIO18/19 correctly, used by 2 GPIO expanders
[ARM] pxa/zylonite: fix the issue of unused SDATA_IN_1 pin get AC97 not working
[ARM] pxa: make ads7846 on corgi and spitz to sync on HSYNC
[ARM] pxa: remove unused CPU_FREQ_PXA Kconfig symbol
...
Diffstat (limited to 'arch/arm/mach-davinci/serial.c')
-rw-r--r-- | arch/arm/mach-davinci/serial.c | 95 |
1 files changed, 78 insertions, 17 deletions
diff --git a/arch/arm/mach-davinci/serial.c b/arch/arm/mach-davinci/serial.c index 3010f997125..69507579652 100644 --- a/arch/arm/mach-davinci/serial.c +++ b/arch/arm/mach-davinci/serial.c @@ -32,32 +32,47 @@ #include <mach/hardware.h> #include <mach/serial.h> #include <mach/irqs.h> +#include <mach/cputype.h> +#include "clock.h" -#define UART_DAVINCI_PWREMU 0x0c - -static inline unsigned int davinci_serial_in(struct plat_serial8250_port *up, - int offset) +static inline unsigned int serial_read_reg(struct plat_serial8250_port *up, + int offset) { offset <<= up->regshift; - return (unsigned int)__raw_readb(up->membase + offset); + return (unsigned int)__raw_readl(IO_ADDRESS(up->mapbase) + offset); } -static inline void davinci_serial_outp(struct plat_serial8250_port *p, - int offset, int value) +static inline void serial_write_reg(struct plat_serial8250_port *p, int offset, + int value) { offset <<= p->regshift; - __raw_writeb(value, p->membase + offset); + __raw_writel(value, IO_ADDRESS(p->mapbase) + offset); } static struct plat_serial8250_port serial_platform_data[] = { { - .membase = (char *)IO_ADDRESS(DAVINCI_UART0_BASE), - .mapbase = (unsigned long)DAVINCI_UART0_BASE, + .mapbase = DAVINCI_UART0_BASE, .irq = IRQ_UARTINT0, - .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, + .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | + UPF_IOREMAP, + .iotype = UPIO_MEM, + .regshift = 2, + }, + { + .mapbase = DAVINCI_UART1_BASE, + .irq = IRQ_UARTINT1, + .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | + UPF_IOREMAP, + .iotype = UPIO_MEM, + .regshift = 2, + }, + { + .mapbase = DAVINCI_UART2_BASE, + .irq = IRQ_UARTINT2, + .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | + UPF_IOREMAP, .iotype = UPIO_MEM, .regshift = 2, - .uartclk = 27000000, }, { .flags = 0 @@ -74,22 +89,68 @@ static struct platform_device serial_device = { static void __init davinci_serial_reset(struct plat_serial8250_port *p) { - /* reset both transmitter and receiver: bits 14,13 = UTRST, URRST */ unsigned int pwremu = 0; - davinci_serial_outp(p, UART_IER, 0); /* disable all interrupts */ + serial_write_reg(p, UART_IER, 0); /* disable all interrupts */ - davinci_serial_outp(p, UART_DAVINCI_PWREMU, pwremu); + /* reset both transmitter and receiver: bits 14,13 = UTRST, URRST */ + serial_write_reg(p, UART_DAVINCI_PWREMU, pwremu); mdelay(10); pwremu |= (0x3 << 13); pwremu |= 0x1; - davinci_serial_outp(p, UART_DAVINCI_PWREMU, pwremu); + serial_write_reg(p, UART_DAVINCI_PWREMU, pwremu); + + if (cpu_is_davinci_dm646x()) + serial_write_reg(p, UART_DM646X_SCR, + UART_DM646X_SCR_TX_WATERMARK); +} + +void __init davinci_serial_init(struct davinci_uart_config *info) +{ + int i; + char name[16]; + struct clk *uart_clk; + struct device *dev = &serial_device.dev; + + /* + * Make sure the serial ports are muxed on at this point. + * You have to mux them off in device drivers later on + * if not needed. + */ + for (i = 0; i < DAVINCI_MAX_NR_UARTS; i++) { + struct plat_serial8250_port *p = serial_platform_data + i; + + if (!(info->enabled_uarts & (1 << i))) { + p->flags = 0; + continue; + } + + if (cpu_is_davinci_dm646x()) + p->iotype = UPIO_MEM32; + + if (cpu_is_davinci_dm355()) { + if (i == 2) { + p->mapbase = (unsigned long)DM355_UART2_BASE; + p->irq = IRQ_DM355_UARTINT2; + } + } + + sprintf(name, "uart%d", i); + uart_clk = clk_get(dev, name); + if (IS_ERR(uart_clk)) + printk(KERN_ERR "%s:%d: failed to get UART%d clock\n", + __func__, __LINE__, i); + else { + clk_enable(uart_clk); + p->uartclk = clk_get_rate(uart_clk); + davinci_serial_reset(p); + } + } } static int __init davinci_init(void) { - davinci_serial_reset(&serial_platform_data[0]); return platform_device_register(&serial_device); } |