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arm/mach-aspeed: Remove UART prints & early_init printks #21

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arm/mach-aspeed: Remove UART prints & early_init printks #21

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57 changes: 12 additions & 45 deletions arch/arm/mach-aspeed/aspeed.c
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Original file line number Diff line number Diff line change
Expand Up @@ -72,17 +72,12 @@ static struct map_desc aspeed_io_desc[] __initdata __maybe_unused = {

#define LCR_DLAB 0x80

static void udbg_uart_out(unsigned int reg, u8 data)
static void ast_uart_out(unsigned int reg, u8 data)
{
writeb(data, AST_IO(0x1E78F000 + reg * 4));
}

static u8 udbg_uart_in(unsigned int reg)
{
return readb(AST_IO(0x1E78F000 + reg * 4)) & 0xff;
}

static void udbg_uart_setup(unsigned int speed, unsigned int clock)
static void ast_host_uart_setup(unsigned int speed, unsigned int clock)
{
unsigned int dll, base_bauds;

Expand All @@ -94,34 +89,18 @@ static void udbg_uart_setup(unsigned int speed, unsigned int clock)
base_bauds = clock / 16;
dll = base_bauds / speed;

printk("DLL=%d\n", dll);
udbg_uart_out(UART_LCR, 0x00);
udbg_uart_out(UART_IER, 0xff);
udbg_uart_out(UART_IER, 0x00);
udbg_uart_out(UART_LCR, LCR_DLAB);
udbg_uart_out(UART_DLL, dll & 0xff);
udbg_uart_out(UART_DLM, dll >> 8);
ast_uart_out(UART_LCR, 0x00);
ast_uart_out(UART_IER, 0xff);
ast_uart_out(UART_IER, 0x00);
ast_uart_out(UART_LCR, LCR_DLAB);
ast_uart_out(UART_DLL, dll & 0xff);
ast_uart_out(UART_DLM, dll >> 8);
/* 8 data, 1 stop, no parity */
udbg_uart_out(UART_LCR, 0x3);
ast_uart_out(UART_LCR, 0x3);
/* RTS/DTR */
udbg_uart_out(UART_MCR, 0x3);
ast_uart_out(UART_MCR, 0x3);
/* Clear & enable FIFOs */
udbg_uart_out(UART_FCR, 0x7);
}

static void udbg_uart_flush(void)
{
/* wait for idle */
while ((udbg_uart_in(UART_LSR) & LSR_THRE) == 0)
;
}

static void udbg_uart_putc(char c)
{
if (c == '\n')
udbg_uart_putc('\r');
udbg_uart_flush();
udbg_uart_out(UART_THR, c);
ast_uart_out(UART_FCR, 0x7);
}

#define SCU_PASSWORD 0x1688A8A8
Expand All @@ -131,11 +110,8 @@ static void __init aspeed_init_early(void)
u32 reg;

// XXX UART stuff to fix to pinmux & co
printk("UART IO MUX...\n");
writel(0x02010023, AST_IO(AST_BASE_LPC | 0x9c));
printk("UART PIN MUX...\n");
writel(SCU_PASSWORD, AST_IO(AST_BASE_SCU)); // UNLOCK SCU
printk("SCU LOCK: %08x\n", readl(AST_IO(AST_BASE_SCU)));
writel(0xcb000000, AST_IO(AST_BASE_SCU | 0x80));
writel(0x00fff0c0, AST_IO(AST_BASE_SCU | 0x84));
writel(0x10CC5E80, AST_IO(AST_BASE_SCU | 0x0c));
Expand All @@ -146,19 +122,10 @@ static void __init aspeed_init_early(void)
*/
reg = readl(AST_IO(AST_BASE_SCU | 0x2c));
writel(reg | 0x00001000, AST_IO(AST_BASE_SCU | 0x2c));
ast_host_uart_setup(115200,0);

printk("DONE, MUX=%08x %08x\n", readl(AST_IO(AST_BASE_SCU | 0x80)),
readl(AST_IO(AST_BASE_SCU | 0x84)));
printk("CLOCK_CTRL=%08x\n", readl(AST_IO(AST_BASE_SCU)));
printk("WDT0C=%08x\n", readl(AST_IO(AST_BASE_WDT | 0x0c)));
writel(0, AST_IO(AST_BASE_WDT | 0x0c));
printk("WDT2C=%08x\n", readl(AST_IO(AST_BASE_WDT | 0x2c)));
writel(0, AST_IO(AST_BASE_WDT | 0x2c));
udbg_uart_setup(115200,0);
udbg_uart_putc('F');
udbg_uart_putc('O');
udbg_uart_putc('O');
udbg_uart_putc('\n');

/*
* temporary: enable i2c usage of the shared GPIO/I2C pins for
Expand Down