forked from Minki/linux
[PATCH] ppc64: Split SCC and 15550 udbg code
Split scc and 15550 functions from udbg each into their own file. This makes them more symetric with the lpar and btext code. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Milton Miller
Paul Mackerras
parent
37548d58e5
commit
7f853352e7
@ -31,7 +31,7 @@ obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o prom.o
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obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \
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pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
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pSeries_setup.o pSeries_iommu.o
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pSeries_setup.o pSeries_iommu.o udbg_16550.o
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obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_iommu.o bpa_nvram.o \
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bpa_iic.o spider-pic.o
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@ -58,9 +58,11 @@ obj-$(CONFIG_XICS) += xics.o
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obj-$(CONFIG_MPIC) += mpic.o
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obj-$(CONFIG_PPC_PMAC) += pmac_setup.o pmac_feature.o pmac_pci.o \
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pmac_time.o pmac_nvram.o pmac_low_i2c.o
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pmac_time.o pmac_nvram.o pmac_low_i2c.o \
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udbg_scc.o
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obj-$(CONFIG_PPC_MAPLE) += maple_setup.o maple_pci.o maple_time.o
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obj-$(CONFIG_PPC_MAPLE) += maple_setup.o maple_pci.o maple_time.o \
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udbg_16550.o
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obj-$(CONFIG_U3_DART) += u3_iommu.o
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@ -1,5 +1,5 @@
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/*
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* NS16550 Serial Port (uart) debugging stuff.
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* polling mode stateless debugging stuff, originally for NS16550 Serial Ports
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*
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* c 2001 PPC 64 Team, IBM Corp
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*
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@ -19,229 +19,6 @@
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#include <asm/machdep.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/pmac_feature.h>
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extern u8 real_readb(volatile u8 __iomem *addr);
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extern void real_writeb(u8 data, volatile u8 __iomem *addr);
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struct NS16550 {
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/* this struct must be packed */
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unsigned char rbr; /* 0 */
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unsigned char ier; /* 1 */
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unsigned char fcr; /* 2 */
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unsigned char lcr; /* 3 */
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unsigned char mcr; /* 4 */
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unsigned char lsr; /* 5 */
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unsigned char msr; /* 6 */
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unsigned char scr; /* 7 */
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};
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#define thr rbr
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#define iir fcr
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#define dll rbr
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#define dlm ier
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#define dlab lcr
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#define LSR_DR 0x01 /* Data ready */
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#define LSR_OE 0x02 /* Overrun */
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#define LSR_PE 0x04 /* Parity error */
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#define LSR_FE 0x08 /* Framing error */
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#define LSR_BI 0x10 /* Break */
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#define LSR_THRE 0x20 /* Xmit holding register empty */
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#define LSR_TEMT 0x40 /* Xmitter empty */
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#define LSR_ERR 0x80 /* Error */
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static volatile struct NS16550 __iomem *udbg_comport;
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void udbg_init_uart(void __iomem *comport, unsigned int speed)
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{
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u16 dll = speed ? (115200 / speed) : 12;
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if (comport) {
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udbg_comport = (struct NS16550 __iomem *)comport;
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out_8(&udbg_comport->lcr, 0x00);
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out_8(&udbg_comport->ier, 0xff);
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out_8(&udbg_comport->ier, 0x00);
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out_8(&udbg_comport->lcr, 0x80); /* Access baud rate */
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out_8(&udbg_comport->dll, dll & 0xff); /* 1 = 115200, 2 = 57600,
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3 = 38400, 12 = 9600 baud */
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out_8(&udbg_comport->dlm, dll >> 8); /* dll >> 8 which should be zero
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for fast rates; */
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out_8(&udbg_comport->lcr, 0x03); /* 8 data, 1 stop, no parity */
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out_8(&udbg_comport->mcr, 0x03); /* RTS/DTR */
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out_8(&udbg_comport->fcr ,0x07); /* Clear & enable FIFOs */
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ppc_md.udbg_putc = udbg_putc; /* set access methods */
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ppc_md.udbg_getc = udbg_getc;
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ppc_md.udbg_getc_poll = udbg_getc_poll;
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}
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}
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#ifdef CONFIG_PPC_PMAC
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#define SCC_TXRDY 4
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#define SCC_RXRDY 1
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static volatile u8 __iomem *sccc;
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static volatile u8 __iomem *sccd;
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static unsigned char scc_inittab[] = {
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13, 0, /* set baud rate divisor */
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12, 0,
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14, 1, /* baud rate gen enable, src=rtxc */
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11, 0x50, /* clocks = br gen */
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5, 0xea, /* tx 8 bits, assert DTR & RTS */
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4, 0x46, /* x16 clock, 1 stop */
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3, 0xc1, /* rx enable, 8 bits */
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};
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void udbg_init_scc(struct device_node *np)
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{
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u32 *reg;
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unsigned long addr;
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int i, x;
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if (np == NULL)
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np = of_find_node_by_name(NULL, "escc");
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if (np == NULL || np->parent == NULL)
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return;
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udbg_printf("found SCC...\n");
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/* Get address within mac-io ASIC */
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reg = (u32 *)get_property(np, "reg", NULL);
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if (reg == NULL)
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return;
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addr = reg[0];
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udbg_printf("local addr: %lx\n", addr);
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/* Get address of mac-io PCI itself */
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reg = (u32 *)get_property(np->parent, "assigned-addresses", NULL);
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if (reg == NULL)
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return;
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addr += reg[2];
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udbg_printf("final addr: %lx\n", addr);
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/* Setup for 57600 8N1 */
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addr += 0x20;
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sccc = (volatile u8 * __iomem) ioremap(addr & PAGE_MASK, PAGE_SIZE) ;
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sccc += addr & ~PAGE_MASK;
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sccd = sccc + 0x10;
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udbg_printf("ioremap result sccc: %p\n", sccc);
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mb();
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for (i = 20000; i != 0; --i)
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x = in_8(sccc);
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out_8(sccc, 0x09); /* reset A or B side */
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out_8(sccc, 0xc0);
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for (i = 0; i < sizeof(scc_inittab); ++i)
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out_8(sccc, scc_inittab[i]);
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ppc_md.udbg_putc = udbg_putc;
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ppc_md.udbg_getc = udbg_getc;
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ppc_md.udbg_getc_poll = udbg_getc_poll;
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udbg_puts("Hello World !\n");
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}
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#endif /* CONFIG_PPC_PMAC */
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#ifdef CONFIG_PPC_PMAC
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static void udbg_real_putc(unsigned char c)
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{
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while ((real_readb(sccc) & SCC_TXRDY) == 0)
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;
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real_writeb(c, sccd);
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if (c == '\n')
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udbg_real_putc('\r');
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}
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void udbg_init_pmac_realmode(void)
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{
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sccc = (volatile u8 __iomem *)0x80013020ul;
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sccd = (volatile u8 __iomem *)0x80013030ul;
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ppc_md.udbg_putc = udbg_real_putc;
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ppc_md.udbg_getc = NULL;
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ppc_md.udbg_getc_poll = NULL;
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}
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#endif /* CONFIG_PPC_PMAC */
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#ifdef CONFIG_PPC_MAPLE
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void udbg_maple_real_putc(unsigned char c)
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{
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if (udbg_comport) {
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while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
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/* wait for idle */;
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real_writeb(c, &udbg_comport->thr); eieio();
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if (c == '\n')
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udbg_maple_real_putc('\r');
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}
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}
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void udbg_init_maple_realmode(void)
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{
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udbg_comport = (volatile struct NS16550 __iomem *)0xf40003f8;
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ppc_md.udbg_putc = udbg_maple_real_putc;
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ppc_md.udbg_getc = NULL;
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ppc_md.udbg_getc_poll = NULL;
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}
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#endif /* CONFIG_PPC_MAPLE */
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void udbg_putc(unsigned char c)
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{
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if (udbg_comport) {
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while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
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/* wait for idle */;
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out_8(&udbg_comport->thr, c);
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if (c == '\n')
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udbg_putc('\r');
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}
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#ifdef CONFIG_PPC_PMAC
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else if (sccc) {
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while ((in_8(sccc) & SCC_TXRDY) == 0)
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;
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out_8(sccd, c);
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if (c == '\n')
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udbg_putc('\r');
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}
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#endif /* CONFIG_PPC_PMAC */
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}
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int udbg_getc_poll(void)
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{
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if (udbg_comport) {
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if ((in_8(&udbg_comport->lsr) & LSR_DR) != 0)
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return in_8(&udbg_comport->rbr);
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else
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return -1;
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}
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#ifdef CONFIG_PPC_PMAC
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else if (sccc) {
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if ((in_8(sccc) & SCC_RXRDY) != 0)
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return in_8(sccd);
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else
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return -1;
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}
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#endif /* CONFIG_PPC_PMAC */
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return -1;
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}
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unsigned char udbg_getc(void)
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{
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if (udbg_comport) {
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while ((in_8(&udbg_comport->lsr) & LSR_DR) == 0)
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/* wait for char */;
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return in_8(&udbg_comport->rbr);
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}
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#ifdef CONFIG_PPC_PMAC
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else if (sccc) {
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while ((in_8(sccc) & SCC_RXRDY) == 0)
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;
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return in_8(sccd);
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}
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#endif /* CONFIG_PPC_PMAC */
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return 0;
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}
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void udbg_puts(const char *s)
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{
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128
arch/ppc64/kernel/udbg_16550.c
Normal file
128
arch/ppc64/kernel/udbg_16550.c
Normal file
@ -0,0 +1,128 @@
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/*
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* udbg for for NS16550 compatable serial ports
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*
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* Copyright (C) 2001-2005 PPC 64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <asm/ppcdebug.h>
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#include <asm/processor.h>
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#include <asm/naca.h>
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#include <asm/uaccess.h>
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#include <asm/machdep.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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extern u8 real_readb(volatile u8 __iomem *addr);
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extern void real_writeb(u8 data, volatile u8 __iomem *addr);
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struct NS16550 {
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/* this struct must be packed */
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unsigned char rbr; /* 0 */
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unsigned char ier; /* 1 */
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unsigned char fcr; /* 2 */
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unsigned char lcr; /* 3 */
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unsigned char mcr; /* 4 */
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unsigned char lsr; /* 5 */
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unsigned char msr; /* 6 */
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unsigned char scr; /* 7 */
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};
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#define thr rbr
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#define iir fcr
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#define dll rbr
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#define dlm ier
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#define dlab lcr
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#define LSR_DR 0x01 /* Data ready */
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#define LSR_OE 0x02 /* Overrun */
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#define LSR_PE 0x04 /* Parity error */
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#define LSR_FE 0x08 /* Framing error */
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#define LSR_BI 0x10 /* Break */
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#define LSR_THRE 0x20 /* Xmit holding register empty */
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#define LSR_TEMT 0x40 /* Xmitter empty */
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#define LSR_ERR 0x80 /* Error */
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static volatile struct NS16550 __iomem *udbg_comport;
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static void udbg_550_putc(unsigned char c)
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{
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if (udbg_comport) {
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while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
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/* wait for idle */;
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out_8(&udbg_comport->thr, c);
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if (c == '\n')
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udbg_550_putc('\r');
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}
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}
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static int udbg_550_getc_poll(void)
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{
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if (udbg_comport) {
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if ((in_8(&udbg_comport->lsr) & LSR_DR) != 0)
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return in_8(&udbg_comport->rbr);
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else
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return -1;
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}
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return -1;
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}
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static unsigned char udbg_550_getc(void)
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{
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if (udbg_comport) {
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while ((in_8(&udbg_comport->lsr) & LSR_DR) == 0)
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/* wait for char */;
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return in_8(&udbg_comport->rbr);
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}
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return 0;
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}
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void udbg_init_uart(void __iomem *comport, unsigned int speed)
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{
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u16 dll = speed ? (115200 / speed) : 12;
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if (comport) {
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udbg_comport = (struct NS16550 __iomem *)comport;
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out_8(&udbg_comport->lcr, 0x00);
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out_8(&udbg_comport->ier, 0xff);
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out_8(&udbg_comport->ier, 0x00);
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out_8(&udbg_comport->lcr, 0x80); /* Access baud rate */
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out_8(&udbg_comport->dll, dll & 0xff); /* 1 = 115200, 2 = 57600,
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3 = 38400, 12 = 9600 baud */
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out_8(&udbg_comport->dlm, dll >> 8); /* dll >> 8 which should be zero
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for fast rates; */
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out_8(&udbg_comport->lcr, 0x03); /* 8 data, 1 stop, no parity */
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out_8(&udbg_comport->mcr, 0x03); /* RTS/DTR */
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out_8(&udbg_comport->fcr ,0x07); /* Clear & enable FIFOs */
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ppc_md.udbg_putc = udbg_550_putc;
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ppc_md.udbg_getc = udbg_550_getc;
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ppc_md.udbg_getc_poll = udbg_550_getc_poll;
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}
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}
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#ifdef CONFIG_PPC_MAPLE
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void udbg_maple_real_putc(unsigned char c)
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{
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if (udbg_comport) {
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while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
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/* wait for idle */;
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real_writeb(c, &udbg_comport->thr); eieio();
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if (c == '\n')
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udbg_maple_real_putc('\r');
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}
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}
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void udbg_init_maple_realmode(void)
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{
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udbg_comport = (volatile struct NS16550 __iomem *)0xf40003f8;
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ppc_md.udbg_putc = udbg_maple_real_putc;
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ppc_md.udbg_getc = NULL;
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ppc_md.udbg_getc_poll = NULL;
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}
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#endif /* CONFIG_PPC_MAPLE */
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138
arch/ppc64/kernel/udbg_scc.c
Normal file
138
arch/ppc64/kernel/udbg_scc.c
Normal file
@ -0,0 +1,138 @@
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/*
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* udbg for for zilog scc ports as found on Apple PowerMacs
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*
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* Copyright (C) 2001-2005 PPC 64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <asm/ppcdebug.h>
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#include <asm/processor.h>
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#include <asm/naca.h>
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#include <asm/uaccess.h>
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#include <asm/machdep.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/pmac_feature.h>
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extern u8 real_readb(volatile u8 __iomem *addr);
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extern void real_writeb(u8 data, volatile u8 __iomem *addr);
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#define SCC_TXRDY 4
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#define SCC_RXRDY 1
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static volatile u8 __iomem *sccc;
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static volatile u8 __iomem *sccd;
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static void udbg_scc_putc(unsigned char c)
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{
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if (sccc) {
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while ((in_8(sccc) & SCC_TXRDY) == 0)
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;
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out_8(sccd, c);
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if (c == '\n')
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udbg_scc_putc('\r');
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}
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}
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static int udbg_scc_getc_poll(void)
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{
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if (sccc) {
|
||||
if ((in_8(sccc) & SCC_RXRDY) != 0)
|
||||
return in_8(sccd);
|
||||
else
|
||||
return -1;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
static unsigned char udbg_scc_getc(void)
|
||||
{
|
||||
if (sccc) {
|
||||
while ((in_8(sccc) & SCC_RXRDY) == 0)
|
||||
;
|
||||
return in_8(sccd);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned char scc_inittab[] = {
|
||||
13, 0, /* set baud rate divisor */
|
||||
12, 0,
|
||||
14, 1, /* baud rate gen enable, src=rtxc */
|
||||
11, 0x50, /* clocks = br gen */
|
||||
5, 0xea, /* tx 8 bits, assert DTR & RTS */
|
||||
4, 0x46, /* x16 clock, 1 stop */
|
||||
3, 0xc1, /* rx enable, 8 bits */
|
||||
};
|
||||
|
||||
void udbg_init_scc(struct device_node *np)
|
||||
{
|
||||
u32 *reg;
|
||||
unsigned long addr;
|
||||
int i, x;
|
||||
|
||||
if (np == NULL)
|
||||
np = of_find_node_by_name(NULL, "escc");
|
||||
if (np == NULL || np->parent == NULL)
|
||||
return;
|
||||
|
||||
udbg_printf("found SCC...\n");
|
||||
/* Get address within mac-io ASIC */
|
||||
reg = (u32 *)get_property(np, "reg", NULL);
|
||||
if (reg == NULL)
|
||||
return;
|
||||
addr = reg[0];
|
||||
udbg_printf("local addr: %lx\n", addr);
|
||||
/* Get address of mac-io PCI itself */
|
||||
reg = (u32 *)get_property(np->parent, "assigned-addresses", NULL);
|
||||
if (reg == NULL)
|
||||
return;
|
||||
addr += reg[2];
|
||||
udbg_printf("final addr: %lx\n", addr);
|
||||
|
||||
/* Setup for 57600 8N1 */
|
||||
addr += 0x20;
|
||||
sccc = (volatile u8 * __iomem) ioremap(addr & PAGE_MASK, PAGE_SIZE) ;
|
||||
sccc += addr & ~PAGE_MASK;
|
||||
sccd = sccc + 0x10;
|
||||
|
||||
udbg_printf("ioremap result sccc: %p\n", sccc);
|
||||
mb();
|
||||
|
||||
for (i = 20000; i != 0; --i)
|
||||
x = in_8(sccc);
|
||||
out_8(sccc, 0x09); /* reset A or B side */
|
||||
out_8(sccc, 0xc0);
|
||||
for (i = 0; i < sizeof(scc_inittab); ++i)
|
||||
out_8(sccc, scc_inittab[i]);
|
||||
|
||||
ppc_md.udbg_putc = udbg_scc_putc;
|
||||
ppc_md.udbg_getc = udbg_scc_getc;
|
||||
ppc_md.udbg_getc_poll = udbg_scc_getc_poll;
|
||||
|
||||
udbg_puts("Hello World !\n");
|
||||
}
|
||||
|
||||
static void udbg_real_scc_putc(unsigned char c)
|
||||
{
|
||||
while ((real_readb(sccc) & SCC_TXRDY) == 0)
|
||||
;
|
||||
real_writeb(c, sccd);
|
||||
if (c == '\n')
|
||||
udbg_real_scc_putc('\r');
|
||||
}
|
||||
|
||||
void udbg_init_pmac_realmode(void)
|
||||
{
|
||||
sccc = (volatile u8 __iomem *)0x80013020ul;
|
||||
sccd = (volatile u8 __iomem *)0x80013030ul;
|
||||
|
||||
ppc_md.udbg_putc = udbg_real_scc_putc;
|
||||
ppc_md.udbg_getc = NULL;
|
||||
ppc_md.udbg_getc_poll = NULL;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user