/* Translate ISA address. If it fails, we still register the port
* with no translated address so that it can be picked up as an IO
* port later by the serial driver
+ *
+ * Note: Don't even try on P8 lpc, we know it's not directly mapped
*/
- taddr = of_translate_address(np, reg);
- if (taddr == OF_BAD_ADDR)
+ if (!of_device_is_compatible(isa_brg, "ibm,power8-lpc")) {
+ taddr = of_translate_address(np, reg);
+ if (taddr == OF_BAD_ADDR)
+ taddr = 0;
+ } else
taddr = 0;
/* Add port, irq will be dealt with later */
- return add_legacy_port(np, index, UPIO_PORT, be32_to_cpu(reg[1]), taddr,
- NO_IRQ, UPF_BOOT_AUTOCONF, 0);
+ return add_legacy_port(np, index, UPIO_PORT, be32_to_cpu(reg[1]),
+ taddr, NO_IRQ, UPF_BOOT_AUTOCONF, 0);
}
static void __init setup_legacy_serial_console(int console)
{
- struct legacy_serial_info *info =
- &legacy_serial_infos[console];
+ struct legacy_serial_info *info = &legacy_serial_infos[console];
+ struct plat_serial8250_port *port = &legacy_serial_ports[console];
void __iomem *addr;
- if (info->taddr == 0)
- return;
- addr = ioremap(info->taddr, 0x1000);
- if (addr == NULL)
- return;
+ /* Check if a translated MMIO address has been found */
+ if (info->taddr) {
+ addr = ioremap(info->taddr, 0x1000);
+ if (addr == NULL)
+ return;
+ udbg_uart_init_mmio(addr, 1);
+ } else {
+ /* Check if it's PIO and we support untranslated PIO */
+ if (port->iotype == UPIO_PORT && isa_io_special)
+ udbg_uart_init_pio(port->iobase, 1);
+ else
+ return;
+ }
+
+ /* Try to query the current speed */
if (info->speed == 0)
- info->speed = udbg_probe_uart_speed(addr, info->clock);
+ info->speed = udbg_probe_uart_speed(info->clock);
+
+ /* Set it up */
DBG("default console speed = %d\n", info->speed);
- udbg_init_uart(addr, info->speed, info->clock);
+ udbg_uart_setup(info->speed, info->clock);
}
/*
/* Next, fill our array with ISA ports */
for_each_node_by_type(np, "serial") {
struct device_node *isa = of_get_parent(np);
- if (isa && !strcmp(isa->name, "isa")) {
+ if (isa && (!strcmp(isa->name, "isa") ||
+ !strcmp(isa->name, "lpc"))) {
index = add_legacy_isa_port(np, isa);
if (index >= 0 && np == stdout)
legacy_serial_console = index;
extern u8 real_205_readb(volatile u8 __iomem *addr);
extern void real_205_writeb(u8 data, volatile u8 __iomem *addr);
-struct NS16550 {
- /* this struct must be packed */
- unsigned char rbr; /* 0 */
- unsigned char ier; /* 1 */
- unsigned char fcr; /* 2 */
- unsigned char lcr; /* 3 */
- unsigned char mcr; /* 4 */
- unsigned char lsr; /* 5 */
- unsigned char msr; /* 6 */
- unsigned char scr; /* 7 */
-};
-
-#define thr rbr
-#define iir fcr
-#define dll rbr
-#define dlm ier
-#define dlab lcr
+#define UART_RBR 0
+#define UART_IER 1
+#define UART_FCR 2
+#define UART_LCR 3
+#define UART_MCR 4
+#define UART_LSR 5
+#define UART_MSR 6
+#define UART_SCR 7
+#define UART_THR UART_RBR
+#define UART_IIR UART_FCR
+#define UART_DLL UART_RBR
+#define UART_DLM UART_IER
+#define UART_DLAB UART_LCR
#define LSR_DR 0x01 /* Data ready */
#define LSR_OE 0x02 /* Overrun */
#define LCR_DLAB 0x80
-static struct NS16550 __iomem *udbg_comport;
+static u8 (*udbg_uart_in)(unsigned int reg);
+static void (*udbg_uart_out)(unsigned int reg, u8 data);
-static void udbg_550_flush(void)
+static void udbg_uart_flush(void)
{
- if (udbg_comport) {
- while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
- /* wait for idle */;
- }
+ if (!udbg_uart_in)
+ return;
+
+ /* wait for idle */
+ while ((udbg_uart_in(UART_LSR) & LSR_THRE) == 0)
+ cpu_relax();
}
-static void udbg_550_putc(char c)
+static void udbg_uart_putc(char c)
{
- if (udbg_comport) {
- if (c == '\n')
- udbg_550_putc('\r');
- udbg_550_flush();
- out_8(&udbg_comport->thr, c);
- }
+ if (!udbg_uart_out)
+ return;
+
+ if (c == '\n')
+ udbg_uart_putc('\r');
+ udbg_uart_flush();
+ udbg_uart_out(UART_THR, c);
}
-static int udbg_550_getc_poll(void)
+static int udbg_uart_getc_poll(void)
{
- if (udbg_comport) {
- if ((in_8(&udbg_comport->lsr) & LSR_DR) != 0)
- return in_8(&udbg_comport->rbr);
- else
- return -1;
- }
+ if (!udbg_uart_in || !(udbg_uart_in(UART_LSR) & LSR_DR))
+ return udbg_uart_in(UART_RBR);
return -1;
}
-static int udbg_550_getc(void)
+static int udbg_uart_getc(void)
{
- if (udbg_comport) {
- while ((in_8(&udbg_comport->lsr) & LSR_DR) == 0)
- /* wait for char */;
- return in_8(&udbg_comport->rbr);
- }
- return -1;
+ if (!udbg_uart_in)
+ return -1;
+ /* wait for char */
+ while (!(udbg_uart_in(UART_LSR) & LSR_DR))
+ cpu_relax();
+ return udbg_uart_in(UART_RBR);
+}
+
+static void udbg_use_uart(void)
+{
+ udbg_putc = udbg_uart_putc;
+ udbg_flush = udbg_uart_flush;
+ udbg_getc = udbg_uart_getc;
+ udbg_getc_poll = udbg_uart_getc_poll;
}
-void udbg_init_uart(void __iomem *comport, unsigned int speed,
- unsigned int clock)
+void udbg_uart_setup(unsigned int speed, unsigned int clock)
{
unsigned int dll, base_bauds;
+ if (!udbg_uart_out)
+ return;
+
if (clock == 0)
clock = 1843200;
if (speed == 0)
base_bauds = clock / 16;
dll = base_bauds / speed;
- if (comport) {
- udbg_comport = (struct NS16550 __iomem *)comport;
- out_8(&udbg_comport->lcr, 0x00);
- out_8(&udbg_comport->ier, 0xff);
- out_8(&udbg_comport->ier, 0x00);
- out_8(&udbg_comport->lcr, LCR_DLAB);
- out_8(&udbg_comport->dll, dll & 0xff);
- out_8(&udbg_comport->dlm, dll >> 8);
- /* 8 data, 1 stop, no parity */
- out_8(&udbg_comport->lcr, 0x03);
- /* RTS/DTR */
- out_8(&udbg_comport->mcr, 0x03);
- /* Clear & enable FIFOs */
- out_8(&udbg_comport->fcr ,0x07);
- udbg_putc = udbg_550_putc;
- udbg_flush = udbg_550_flush;
- udbg_getc = udbg_550_getc;
- udbg_getc_poll = udbg_550_getc_poll;
- }
+ 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);
+ /* 8 data, 1 stop, no parity */
+ udbg_uart_out(UART_LCR, 0x3);
+ /* RTS/DTR */
+ udbg_uart_out(UART_MCR, 0x3);
+ /* Clear & enable FIFOs */
+ udbg_uart_out(UART_FCR, 0x7);
}
-unsigned int udbg_probe_uart_speed(void __iomem *comport, unsigned int clock)
+unsigned int udbg_probe_uart_speed(unsigned int clock)
{
unsigned int dll, dlm, divisor, prescaler, speed;
u8 old_lcr;
- struct NS16550 __iomem *port = comport;
- old_lcr = in_8(&port->lcr);
+ old_lcr = udbg_uart_in(UART_LCR);
/* select divisor latch registers. */
- out_8(&port->lcr, LCR_DLAB);
+ udbg_uart_out(UART_LCR, old_lcr | LCR_DLAB);
/* now, read the divisor */
- dll = in_8(&port->dll);
- dlm = in_8(&port->dlm);
+ dll = udbg_uart_in(UART_DLL);
+ dlm = udbg_uart_in(UART_DLM);
divisor = dlm << 8 | dll;
/* check prescaling */
- if (in_8(&port->mcr) & 0x80)
+ if (udbg_uart_in(UART_MCR) & 0x80)
prescaler = 4;
else
prescaler = 1;
/* restore the LCR */
- out_8(&port->lcr, old_lcr);
+ udbg_uart_out(UART_LCR, old_lcr);
/* calculate speed */
speed = (clock / prescaler) / (divisor * 16);
return speed;
}
-#ifdef CONFIG_PPC_MAPLE
-void udbg_maple_real_flush(void)
+static union {
+ unsigned char __iomem *mmio_base;
+ unsigned long pio_base;
+} udbg_uart;
+
+static unsigned int udbg_uart_stride = 1;
+
+static u8 udbg_uart_in_pio(unsigned int reg)
{
- if (udbg_comport) {
- while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
- /* wait for idle */;
- }
+ return inb(udbg_uart.pio_base + (reg * udbg_uart_stride));
}
-void udbg_maple_real_putc(char c)
+static void udbg_uart_out_pio(unsigned int reg, u8 data)
{
- if (udbg_comport) {
- if (c == '\n')
- udbg_maple_real_putc('\r');
- udbg_maple_real_flush();
- real_writeb(c, &udbg_comport->thr); eieio();
- }
+ outb(data, udbg_uart.pio_base + (reg * udbg_uart_stride));
}
-void __init udbg_init_maple_realmode(void)
+void udbg_uart_init_pio(unsigned long port, unsigned int stride)
{
- udbg_comport = (struct NS16550 __iomem *)0xf40003f8;
+ if (!port)
+ return;
+ udbg_uart.pio_base = port;
+ udbg_uart_stride = stride;
+ udbg_uart_in = udbg_uart_in_pio;
+ udbg_uart_out = udbg_uart_out_pio;
+ udbg_use_uart();
+}
- udbg_putc = udbg_maple_real_putc;
- udbg_flush = udbg_maple_real_flush;
- udbg_getc = NULL;
- udbg_getc_poll = NULL;
+static u8 udbg_uart_in_mmio(unsigned int reg)
+{
+ return in_8(udbg_uart.mmio_base + (reg * udbg_uart_stride));
}
-#endif /* CONFIG_PPC_MAPLE */
-#ifdef CONFIG_PPC_PASEMI
-void udbg_pas_real_flush(void)
+static void udbg_uart_out_mmio(unsigned int reg, u8 data)
{
- if (udbg_comport) {
- while ((real_205_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
- /* wait for idle */;
- }
+ out_8(udbg_uart.mmio_base + (reg * udbg_uart_stride), data);
+}
+
+
+void udbg_uart_init_mmio(void __iomem *addr, unsigned int stride)
+{
+ if (!addr)
+ return;
+ udbg_uart.mmio_base = addr;
+ udbg_uart_stride = stride;
+ udbg_uart_in = udbg_uart_in_mmio;
+ udbg_uart_out = udbg_uart_out_mmio;
+ udbg_use_uart();
}
-void udbg_pas_real_putc(char c)
+#ifdef CONFIG_PPC_MAPLE
+
+#define UDBG_UART_MAPLE_ADDR ((void __iomem *)0xf40003f8)
+
+static u8 udbg_uart_in_maple(unsigned int reg)
{
- if (udbg_comport) {
- if (c == '\n')
- udbg_pas_real_putc('\r');
- udbg_pas_real_flush();
- real_205_writeb(c, &udbg_comport->thr); eieio();
- }
+ return real_readb(UDBG_UART_MAPLE_ADDR + reg);
}
-void udbg_init_pas_realmode(void)
+static void udbg_uart_out_maple(unsigned int reg, u8 val)
{
- udbg_comport = (struct NS16550 __iomem *)0xfcff03f8UL;
+ real_writeb(val, UDBG_UART_MAPLE_ADDR + reg);
+}
- udbg_putc = udbg_pas_real_putc;
- udbg_flush = udbg_pas_real_flush;
- udbg_getc = NULL;
- udbg_getc_poll = NULL;
+void __init udbg_init_maple_realmode(void)
+{
+ udbg_uart_in = udbg_uart_in_maple;
+ udbg_uart_out = udbg_uart_out_maple;
+ udbg_use_uart();
}
+
#endif /* CONFIG_PPC_MAPLE */
-#ifdef CONFIG_PPC_EARLY_DEBUG_44x
-#include <platforms/44x/44x.h>
+#ifdef CONFIG_PPC_PASEMI
+
+#define UDBG_UART_PAS_ADDR ((void __iomem *)0xfcff03f8UL)
-static void udbg_44x_as1_flush(void)
+static u8 udbg_uart_in_pas(unsigned int reg)
{
- if (udbg_comport) {
- while ((as1_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
- /* wait for idle */;
- }
+ return real_205_readb(UDBG_UART_PAS_ADDR + reg);
}
-static void udbg_44x_as1_putc(char c)
+static void udbg_uart_out_pas(unsigned int reg, u8 val)
{
- if (udbg_comport) {
- if (c == '\n')
- udbg_44x_as1_putc('\r');
- udbg_44x_as1_flush();
- as1_writeb(c, &udbg_comport->thr); eieio();
- }
+ real_205_writeb(val, UDBG_UART_PAS_ADDR + reg);
}
-static int udbg_44x_as1_getc(void)
+void __init udbg_init_pas_realmode(void)
{
- if (udbg_comport) {
- while ((as1_readb(&udbg_comport->lsr) & LSR_DR) == 0)
- ; /* wait for char */
- return as1_readb(&udbg_comport->rbr);
- }
- return -1;
+ udbg_uart_in = udbg_uart_in_pas;
+ udbg_uart_out = udbg_uart_out_pas;
+ udbg_use_uart();
}
-void __init udbg_init_44x_as1(void)
+#endif /* CONFIG_PPC_PASEMI */
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_44x
+
+#include <platforms/44x/44x.h>
+
+static u8 udbg_uart_in_44x_as1(unsigned int reg)
{
- udbg_comport =
- (struct NS16550 __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR;
+ return as1_readb((void __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR + reg);
+}
- udbg_putc = udbg_44x_as1_putc;
- udbg_flush = udbg_44x_as1_flush;
- udbg_getc = udbg_44x_as1_getc;
+static void udbg_uart_out_44x_as1(unsigned int reg, u8 val)
+{
+ as1_writeb(val, (void __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR + reg);
}
-#endif /* CONFIG_PPC_EARLY_DEBUG_44x */
-#ifdef CONFIG_PPC_EARLY_DEBUG_40x
-static void udbg_40x_real_flush(void)
+void __init udbg_init_44x_as1(void)
{
- if (udbg_comport) {
- while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
- /* wait for idle */;
- }
+ udbg_uart_in = udbg_uart_in_44x_as1;
+ udbg_uart_out = udbg_uart_out_44x_as1;
+ udbg_use_uart();
}
-static void udbg_40x_real_putc(char c)
+#endif /* CONFIG_PPC_EARLY_DEBUG_44x */
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_40x
+
+static u8 udbg_uart_in_40x(unsigned int reg)
{
- if (udbg_comport) {
- if (c == '\n')
- udbg_40x_real_putc('\r');
- udbg_40x_real_flush();
- real_writeb(c, &udbg_comport->thr); eieio();
- }
+ return real_readb((void __iomem *)CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR
+ + reg);
}
-static int udbg_40x_real_getc(void)
+static void udbg_uart_out_40x(unsigned int reg, u8 val)
{
- if (udbg_comport) {
- while ((real_readb(&udbg_comport->lsr) & LSR_DR) == 0)
- ; /* wait for char */
- return real_readb(&udbg_comport->rbr);
- }
- return -1;
+ real_writeb(val, (void __iomem *)CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR
+ + reg);
}
void __init udbg_init_40x_realmode(void)
{
- udbg_comport = (struct NS16550 __iomem *)
- CONFIG_PPC_EARLY_DEBUG_40x_PHYSADDR;
-
- udbg_putc = udbg_40x_real_putc;
- udbg_flush = udbg_40x_real_flush;
- udbg_getc = udbg_40x_real_getc;
- udbg_getc_poll = NULL;
+ udbg_uart_in = udbg_uart_in_40x;
+ udbg_uart_out = udbg_uart_out_40x;
+ udbg_use_uart();
}
+
#endif /* CONFIG_PPC_EARLY_DEBUG_40x */
+
#ifdef CONFIG_PPC_EARLY_DEBUG_WSP
+
static void udbg_wsp_flush(void)
{
if (udbg_comport) {
void __init udbg_init_wsp(void)
{
- udbg_comport = (struct NS16550 __iomem *)WSP_UART_VIRT;
-
- udbg_init_uart(udbg_comport, 57600, 50000000);
-
- udbg_putc = udbg_wsp_putc;
- udbg_flush = udbg_wsp_flush;
- udbg_getc = udbg_wsp_getc;
- udbg_getc_poll = udbg_wsp_getc_poll;
+ udbg_uart_init_mmio(WSP_UART_VIRT, 1);
+ udbg_uart_setup(57600, 50000000);
}
+
#endif /* CONFIG_PPC_EARLY_DEBUG_WSP */
projects / profile / ivi / kernel-x86-ivi.git / commitdiff