From 5ef316fbe7fd03802b8625833884587927161c14 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Tue, 3 Feb 2009 23:48:54 +0000 Subject: [ARM] S3C64XX: Add S3C64XX_PA_IIS{0,1} to Add the physical address of the two I2S channel register blocks. Signed-off-by: Ben Dooks --- arch/arm/mach-s3c6400/include/mach/map.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/mach-s3c6400/include/mach/map.h b/arch/arm/mach-s3c6400/include/mach/map.h index baf1c0f1ea5a..8199972ed5bd 100644 --- a/arch/arm/mach-s3c6400/include/mach/map.h +++ b/arch/arm/mach-s3c6400/include/mach/map.h @@ -40,6 +40,8 @@ #define S3C64XX_PA_FB (0x77100000) #define S3C64XX_PA_SYSCON (0x7E00F000) +#define S3C64XX_PA_IIS0 (0x7F002000) +#define S3C64XX_PA_IIS1 (0x7F003000) #define S3C64XX_PA_TIMER (0x7F006000) #define S3C64XX_PA_IIC0 (0x7F004000) #define S3C64XX_PA_IIC1 (0x7F00F000) -- cgit v1.2.3 From 090f848da000083bf6c1a052222396970e53b4d7 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Fri, 12 Dec 2008 00:24:21 +0000 Subject: [ARM] S3C: Add UDIVSLOT support for newer UARTS Add support for the UDIVSLOT register on the newer UART blocks which gives the capability of 1/16ths adjustment to the baud rate. Signed-off-by: Ben Dooks --- drivers/serial/s3c6400.c | 1 + drivers/serial/samsung.c | 61 +++++++++++++++++++++++++++++++++++++++++++++--- drivers/serial/samsung.h | 4 ++++ 3 files changed, 63 insertions(+), 3 deletions(-) diff --git a/drivers/serial/s3c6400.c b/drivers/serial/s3c6400.c index 06936d13393f..3e3785233682 100644 --- a/drivers/serial/s3c6400.c +++ b/drivers/serial/s3c6400.c @@ -102,6 +102,7 @@ static struct s3c24xx_uart_info s3c6400_uart_inf = { .name = "Samsung S3C6400 UART", .type = PORT_S3C6400, .fifosize = 64, + .has_divslot = 1, .rx_fifomask = S3C2440_UFSTAT_RXMASK, .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, .rx_fifofull = S3C2440_UFSTAT_RXFULL, diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c index e06686ae858b..93b5d75db126 100644 --- a/drivers/serial/samsung.c +++ b/drivers/serial/samsung.c @@ -508,6 +508,7 @@ s3c24xx_serial_setsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c) struct baud_calc { struct s3c24xx_uart_clksrc *clksrc; unsigned int calc; + unsigned int divslot; unsigned int quot; struct clk *src; }; @@ -517,6 +518,7 @@ static int s3c24xx_serial_calcbaud(struct baud_calc *calc, struct s3c24xx_uart_clksrc *clksrc, unsigned int baud) { + struct s3c24xx_uart_port *ourport = to_ourport(port); unsigned long rate; calc->src = clk_get(port->dev, clksrc->name); @@ -527,8 +529,24 @@ static int s3c24xx_serial_calcbaud(struct baud_calc *calc, rate /= clksrc->divisor; calc->clksrc = clksrc; - calc->quot = (rate + (8 * baud)) / (16 * baud); - calc->calc = (rate / (calc->quot * 16)); + + if (ourport->info->has_divslot) { + unsigned long div = rate / baud; + + /* The UDIVSLOT register on the newer UARTs allows us to + * get a divisor adjustment of 1/16th on the baud clock. + * + * We don't keep the UDIVSLOT value (the 16ths we calculated + * by not multiplying the baud by 16) as it is easy enough + * to recalculate. + */ + + calc->quot = div / 16; + calc->calc = rate / div; + } else { + calc->quot = (rate + (8 * baud)) / (16 * baud); + calc->calc = (rate / (calc->quot * 16)); + } calc->quot--; return 1; @@ -611,6 +629,30 @@ static unsigned int s3c24xx_serial_getclk(struct uart_port *port, return best->quot; } +/* udivslot_table[] + * + * This table takes the fractional value of the baud divisor and gives + * the recommended setting for the UDIVSLOT register. + */ +static u16 udivslot_table[16] = { + [0] = 0x0000, + [1] = 0x0080, + [2] = 0x0808, + [3] = 0x0888, + [4] = 0x2222, + [5] = 0x4924, + [6] = 0x4A52, + [7] = 0x54AA, + [8] = 0x5555, + [9] = 0xD555, + [10] = 0xD5D5, + [11] = 0xDDD5, + [12] = 0xDDDD, + [13] = 0xDFDD, + [14] = 0xDFDF, + [15] = 0xFFDF, +}; + static void s3c24xx_serial_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) @@ -623,6 +665,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, unsigned int baud, quot; unsigned int ulcon; unsigned int umcon; + unsigned int udivslot = 0; /* * We don't support modem control lines. @@ -644,6 +687,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, /* check to see if we need to change clock source */ if (ourport->clksrc != clksrc || ourport->baudclk != clk) { + dbg("selecting clock %p\n", clk); s3c24xx_serial_setsource(port, clksrc); if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) { @@ -658,6 +702,13 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0; } + if (ourport->info->has_divslot) { + unsigned int div = ourport->baudclk_rate / baud; + + udivslot = udivslot_table[div & 15]; + dbg("udivslot = %04x (div %d)\n", udivslot, div & 15); + } + switch (termios->c_cflag & CSIZE) { case CS5: dbg("config: 5bits/char\n"); @@ -697,12 +748,16 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, spin_lock_irqsave(&port->lock, flags); - dbg("setting ulcon to %08x, brddiv to %d\n", ulcon, quot); + dbg("setting ulcon to %08x, brddiv to %d, udivslot %08x\n", + ulcon, quot, udivslot); wr_regl(port, S3C2410_ULCON, ulcon); wr_regl(port, S3C2410_UBRDIV, quot); wr_regl(port, S3C2410_UMCON, umcon); + if (ourport->info->has_divslot) + wr_regl(port, S3C2443_DIVSLOT, udivslot); + dbg("uart: ulcon = 0x%08x, ucon = 0x%08x, ufcon = 0x%08x\n", rd_regl(port, S3C2410_ULCON), rd_regl(port, S3C2410_UCON), diff --git a/drivers/serial/samsung.h b/drivers/serial/samsung.h index 571d6b90d206..7afb94843a08 100644 --- a/drivers/serial/samsung.h +++ b/drivers/serial/samsung.h @@ -21,6 +21,10 @@ struct s3c24xx_uart_info { unsigned long tx_fifoshift; unsigned long tx_fifofull; + /* uart port features */ + + unsigned int has_divslot:1; + /* clock source control */ int (*get_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk); -- cgit v1.2.3 From dc8fc7edef5fe799a1c38c916d2c64b1d0fcf81a Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Tue, 28 Apr 2009 10:06:00 +0100 Subject: [ARM] S3C2412: Add missing cache flush in suspend code The alterations to the suspend code missed adding a call to the cache flushing routines during the suspend path of the S3C2412. Signed-off-by: Ben Dooks --- arch/arm/mach-s3c2412/pm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/mach-s3c2412/pm.c b/arch/arm/mach-s3c2412/pm.c index c9cfe40e21f6..a7417c479ffe 100644 --- a/arch/arm/mach-s3c2412/pm.c +++ b/arch/arm/mach-s3c2412/pm.c @@ -21,6 +21,7 @@ #include #include +#include #include #include @@ -39,6 +40,8 @@ static void s3c2412_cpu_suspend(void) { unsigned long tmp; + flush_cache_all(); + /* set our standby method to sleep */ tmp = __raw_readl(S3C2412_PWRCFG); -- cgit v1.2.3