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authorMilton Miller <miltonm@bga.com>2005-09-05 21:56:02 -0400
committerPaul Mackerras <paulus@samba.org>2005-09-06 02:07:36 -0400
commit7f853352e79bf57c4ee279b7458ed0c072e2be76 (patch)
tree516f26c2b0e5de059c0fda3c1266285f8084de03 /arch
parent37548d58e5ce53dda609c5b35c0eb62d50d59675 (diff)
[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>
Diffstat (limited to 'arch')
-rw-r--r--arch/ppc64/kernel/Makefile8
-rw-r--r--arch/ppc64/kernel/udbg.c225
-rw-r--r--arch/ppc64/kernel/udbg_16550.c128
-rw-r--r--arch/ppc64/kernel/udbg_scc.c138
4 files changed, 272 insertions, 227 deletions
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index f4b3bfcc109d..ae60eb1193c6 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -31,7 +31,7 @@ obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o prom.o
31 31
32obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \ 32obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \
33 pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \ 33 pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
34 pSeries_setup.o pSeries_iommu.o 34 pSeries_setup.o pSeries_iommu.o udbg_16550.o
35 35
36obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_iommu.o bpa_nvram.o \ 36obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_iommu.o bpa_nvram.o \
37 bpa_iic.o spider-pic.o 37 bpa_iic.o spider-pic.o
@@ -58,9 +58,11 @@ obj-$(CONFIG_XICS) += xics.o
58obj-$(CONFIG_MPIC) += mpic.o 58obj-$(CONFIG_MPIC) += mpic.o
59 59
60obj-$(CONFIG_PPC_PMAC) += pmac_setup.o pmac_feature.o pmac_pci.o \ 60obj-$(CONFIG_PPC_PMAC) += pmac_setup.o pmac_feature.o pmac_pci.o \
61 pmac_time.o pmac_nvram.o pmac_low_i2c.o 61 pmac_time.o pmac_nvram.o pmac_low_i2c.o \
62 udbg_scc.o
62 63
63obj-$(CONFIG_PPC_MAPLE) += maple_setup.o maple_pci.o maple_time.o 64obj-$(CONFIG_PPC_MAPLE) += maple_setup.o maple_pci.o maple_time.o \
65 udbg_16550.o
64 66
65obj-$(CONFIG_U3_DART) += u3_iommu.o 67obj-$(CONFIG_U3_DART) += u3_iommu.o
66 68
diff --git a/arch/ppc64/kernel/udbg.c b/arch/ppc64/kernel/udbg.c
index b531583b88d7..67e208500aea 100644
--- a/arch/ppc64/kernel/udbg.c
+++ b/arch/ppc64/kernel/udbg.c
@@ -1,5 +1,5 @@
1/* 1/*
2 * NS16550 Serial Port (uart) debugging stuff. 2 * polling mode stateless debugging stuff, originally for NS16550 Serial Ports
3 * 3 *
4 * c 2001 PPC 64 Team, IBM Corp 4 * c 2001 PPC 64 Team, IBM Corp
5 * 5 *
@@ -19,229 +19,6 @@
19#include <asm/machdep.h> 19#include <asm/machdep.h>
20#include <asm/io.h> 20#include <asm/io.h>
21#include <asm/prom.h> 21#include <asm/prom.h>
22#include <asm/pmac_feature.h>
23
24extern u8 real_readb(volatile u8 __iomem *addr);
25extern void real_writeb(u8 data, volatile u8 __iomem *addr);
26
27struct NS16550 {
28 /* this struct must be packed */
29 unsigned char rbr; /* 0 */
30 unsigned char ier; /* 1 */
31 unsigned char fcr; /* 2 */
32 unsigned char lcr; /* 3 */
33 unsigned char mcr; /* 4 */
34 unsigned char lsr; /* 5 */
35 unsigned char msr; /* 6 */
36 unsigned char scr; /* 7 */
37};
38
39#define thr rbr
40#define iir fcr
41#define dll rbr
42#define dlm ier
43#define dlab lcr
44
45#define LSR_DR 0x01 /* Data ready */
46#define LSR_OE 0x02 /* Overrun */
47#define LSR_PE 0x04 /* Parity error */
48#define LSR_FE 0x08 /* Framing error */
49#define LSR_BI 0x10 /* Break */
50#define LSR_THRE 0x20 /* Xmit holding register empty */
51#define LSR_TEMT 0x40 /* Xmitter empty */
52#define LSR_ERR 0x80 /* Error */
53
54static volatile struct NS16550 __iomem *udbg_comport;
55
56void udbg_init_uart(void __iomem *comport, unsigned int speed)
57{
58 u16 dll = speed ? (115200 / speed) : 12;
59
60 if (comport) {
61 udbg_comport = (struct NS16550 __iomem *)comport;
62 out_8(&udbg_comport->lcr, 0x00);
63 out_8(&udbg_comport->ier, 0xff);
64 out_8(&udbg_comport->ier, 0x00);
65 out_8(&udbg_comport->lcr, 0x80); /* Access baud rate */
66 out_8(&udbg_comport->dll, dll & 0xff); /* 1 = 115200, 2 = 57600,
67 3 = 38400, 12 = 9600 baud */
68 out_8(&udbg_comport->dlm, dll >> 8); /* dll >> 8 which should be zero
69 for fast rates; */
70 out_8(&udbg_comport->lcr, 0x03); /* 8 data, 1 stop, no parity */
71 out_8(&udbg_comport->mcr, 0x03); /* RTS/DTR */
72 out_8(&udbg_comport->fcr ,0x07); /* Clear & enable FIFOs */
73 ppc_md.udbg_putc = udbg_putc; /* set access methods */
74 ppc_md.udbg_getc = udbg_getc;
75 ppc_md.udbg_getc_poll = udbg_getc_poll;
76 }
77}
78
79#ifdef CONFIG_PPC_PMAC
80
81#define SCC_TXRDY 4
82#define SCC_RXRDY 1
83
84static volatile u8 __iomem *sccc;
85static volatile u8 __iomem *sccd;
86
87static unsigned char scc_inittab[] = {
88 13, 0, /* set baud rate divisor */
89 12, 0,
90 14, 1, /* baud rate gen enable, src=rtxc */
91 11, 0x50, /* clocks = br gen */
92 5, 0xea, /* tx 8 bits, assert DTR & RTS */
93 4, 0x46, /* x16 clock, 1 stop */
94 3, 0xc1, /* rx enable, 8 bits */
95};
96
97void udbg_init_scc(struct device_node *np)
98{
99 u32 *reg;
100 unsigned long addr;
101 int i, x;
102
103 if (np == NULL)
104 np = of_find_node_by_name(NULL, "escc");
105 if (np == NULL || np->parent == NULL)
106 return;
107
108 udbg_printf("found SCC...\n");
109 /* Get address within mac-io ASIC */
110 reg = (u32 *)get_property(np, "reg", NULL);
111 if (reg == NULL)
112 return;
113 addr = reg[0];
114 udbg_printf("local addr: %lx\n", addr);
115 /* Get address of mac-io PCI itself */
116 reg = (u32 *)get_property(np->parent, "assigned-addresses", NULL);
117 if (reg == NULL)
118 return;
119 addr += reg[2];
120 udbg_printf("final addr: %lx\n", addr);
121
122 /* Setup for 57600 8N1 */
123 addr += 0x20;
124 sccc = (volatile u8 * __iomem) ioremap(addr & PAGE_MASK, PAGE_SIZE) ;
125 sccc += addr & ~PAGE_MASK;
126 sccd = sccc + 0x10;
127
128 udbg_printf("ioremap result sccc: %p\n", sccc);
129 mb();
130
131 for (i = 20000; i != 0; --i)
132 x = in_8(sccc);
133 out_8(sccc, 0x09); /* reset A or B side */
134 out_8(sccc, 0xc0);
135 for (i = 0; i < sizeof(scc_inittab); ++i)
136 out_8(sccc, scc_inittab[i]);
137
138 ppc_md.udbg_putc = udbg_putc;
139 ppc_md.udbg_getc = udbg_getc;
140 ppc_md.udbg_getc_poll = udbg_getc_poll;
141
142 udbg_puts("Hello World !\n");
143}
144
145#endif /* CONFIG_PPC_PMAC */
146
147#ifdef CONFIG_PPC_PMAC
148static void udbg_real_putc(unsigned char c)
149{
150 while ((real_readb(sccc) & SCC_TXRDY) == 0)
151 ;
152 real_writeb(c, sccd);
153 if (c == '\n')
154 udbg_real_putc('\r');
155}
156
157void udbg_init_pmac_realmode(void)
158{
159 sccc = (volatile u8 __iomem *)0x80013020ul;
160 sccd = (volatile u8 __iomem *)0x80013030ul;
161
162 ppc_md.udbg_putc = udbg_real_putc;
163 ppc_md.udbg_getc = NULL;
164 ppc_md.udbg_getc_poll = NULL;
165}
166#endif /* CONFIG_PPC_PMAC */
167
168#ifdef CONFIG_PPC_MAPLE
169void udbg_maple_real_putc(unsigned char c)
170{
171 if (udbg_comport) {
172 while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
173 /* wait for idle */;
174 real_writeb(c, &udbg_comport->thr); eieio();
175 if (c == '\n')
176 udbg_maple_real_putc('\r');
177 }
178}
179
180void udbg_init_maple_realmode(void)
181{
182 udbg_comport = (volatile struct NS16550 __iomem *)0xf40003f8;
183
184 ppc_md.udbg_putc = udbg_maple_real_putc;
185 ppc_md.udbg_getc = NULL;
186 ppc_md.udbg_getc_poll = NULL;
187}
188#endif /* CONFIG_PPC_MAPLE */
189
190void udbg_putc(unsigned char c)
191{
192 if (udbg_comport) {
193 while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
194 /* wait for idle */;
195 out_8(&udbg_comport->thr, c);
196 if (c == '\n')
197 udbg_putc('\r');
198 }
199#ifdef CONFIG_PPC_PMAC
200 else if (sccc) {
201 while ((in_8(sccc) & SCC_TXRDY) == 0)
202 ;
203 out_8(sccd, c);
204 if (c == '\n')
205 udbg_putc('\r');
206 }
207#endif /* CONFIG_PPC_PMAC */
208}
209
210int udbg_getc_poll(void)
211{
212 if (udbg_comport) {
213 if ((in_8(&udbg_comport->lsr) & LSR_DR) != 0)
214 return in_8(&udbg_comport->rbr);
215 else
216 return -1;
217 }
218#ifdef CONFIG_PPC_PMAC
219 else if (sccc) {
220 if ((in_8(sccc) & SCC_RXRDY) != 0)
221 return in_8(sccd);
222 else
223 return -1;
224 }
225#endif /* CONFIG_PPC_PMAC */
226 return -1;
227}
228
229unsigned char udbg_getc(void)
230{
231 if (udbg_comport) {
232 while ((in_8(&udbg_comport->lsr) & LSR_DR) == 0)
233 /* wait for char */;
234 return in_8(&udbg_comport->rbr);
235 }
236#ifdef CONFIG_PPC_PMAC
237 else if (sccc) {
238 while ((in_8(sccc) & SCC_RXRDY) == 0)
239 ;
240 return in_8(sccd);
241 }
242#endif /* CONFIG_PPC_PMAC */
243 return 0;
244}
245 22
246void udbg_puts(const char *s) 23void udbg_puts(const char *s)
247{ 24{
diff --git a/arch/ppc64/kernel/udbg_16550.c b/arch/ppc64/kernel/udbg_16550.c
new file mode 100644
index 000000000000..46a23e34f7c9
--- /dev/null
+++ b/arch/ppc64/kernel/udbg_16550.c
@@ -0,0 +1,128 @@
1/*
2 * udbg for for NS16550 compatable serial ports
3 *
4 * Copyright (C) 2001-2005 PPC 64 Team, IBM Corp
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11#include <linux/config.h>
12#include <linux/types.h>
13#include <asm/ppcdebug.h>
14#include <asm/processor.h>
15#include <asm/naca.h>
16#include <asm/uaccess.h>
17#include <asm/machdep.h>
18#include <asm/io.h>
19#include <asm/prom.h>
20
21extern u8 real_readb(volatile u8 __iomem *addr);
22extern void real_writeb(u8 data, volatile u8 __iomem *addr);
23
24struct NS16550 {
25 /* this struct must be packed */
26 unsigned char rbr; /* 0 */
27 unsigned char ier; /* 1 */
28 unsigned char fcr; /* 2 */
29 unsigned char lcr; /* 3 */
30 unsigned char mcr; /* 4 */
31 unsigned char lsr; /* 5 */
32 unsigned char msr; /* 6 */
33 unsigned char scr; /* 7 */
34};
35
36#define thr rbr
37#define iir fcr
38#define dll rbr
39#define dlm ier
40#define dlab lcr
41
42#define LSR_DR 0x01 /* Data ready */
43#define LSR_OE 0x02 /* Overrun */
44#define LSR_PE 0x04 /* Parity error */
45#define LSR_FE 0x08 /* Framing error */
46#define LSR_BI 0x10 /* Break */
47#define LSR_THRE 0x20 /* Xmit holding register empty */
48#define LSR_TEMT 0x40 /* Xmitter empty */
49#define LSR_ERR 0x80 /* Error */
50
51static volatile struct NS16550 __iomem *udbg_comport;
52
53static void udbg_550_putc(unsigned char c)
54{
55 if (udbg_comport) {
56 while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
57 /* wait for idle */;
58 out_8(&udbg_comport->thr, c);
59 if (c == '\n')
60 udbg_550_putc('\r');
61 }
62}
63
64static int udbg_550_getc_poll(void)
65{
66 if (udbg_comport) {
67 if ((in_8(&udbg_comport->lsr) & LSR_DR) != 0)
68 return in_8(&udbg_comport->rbr);
69 else
70 return -1;
71 }
72 return -1;
73}
74
75static unsigned char udbg_550_getc(void)
76{
77 if (udbg_comport) {
78 while ((in_8(&udbg_comport->lsr) & LSR_DR) == 0)
79 /* wait for char */;
80 return in_8(&udbg_comport->rbr);
81 }
82 return 0;
83}
84
85void udbg_init_uart(void __iomem *comport, unsigned int speed)
86{
87 u16 dll = speed ? (115200 / speed) : 12;
88
89 if (comport) {
90 udbg_comport = (struct NS16550 __iomem *)comport;
91 out_8(&udbg_comport->lcr, 0x00);
92 out_8(&udbg_comport->ier, 0xff);
93 out_8(&udbg_comport->ier, 0x00);
94 out_8(&udbg_comport->lcr, 0x80); /* Access baud rate */
95 out_8(&udbg_comport->dll, dll & 0xff); /* 1 = 115200, 2 = 57600,
96 3 = 38400, 12 = 9600 baud */
97 out_8(&udbg_comport->dlm, dll >> 8); /* dll >> 8 which should be zero
98 for fast rates; */
99 out_8(&udbg_comport->lcr, 0x03); /* 8 data, 1 stop, no parity */
100 out_8(&udbg_comport->mcr, 0x03); /* RTS/DTR */
101 out_8(&udbg_comport->fcr ,0x07); /* Clear & enable FIFOs */
102 ppc_md.udbg_putc = udbg_550_putc;
103 ppc_md.udbg_getc = udbg_550_getc;
104 ppc_md.udbg_getc_poll = udbg_550_getc_poll;
105 }
106}
107
108#ifdef CONFIG_PPC_MAPLE
109void udbg_maple_real_putc(unsigned char c)
110{
111 if (udbg_comport) {
112 while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
113 /* wait for idle */;
114 real_writeb(c, &udbg_comport->thr); eieio();
115 if (c == '\n')
116 udbg_maple_real_putc('\r');
117 }
118}
119
120void udbg_init_maple_realmode(void)
121{
122 udbg_comport = (volatile struct NS16550 __iomem *)0xf40003f8;
123
124 ppc_md.udbg_putc = udbg_maple_real_putc;
125 ppc_md.udbg_getc = NULL;
126 ppc_md.udbg_getc_poll = NULL;
127}
128#endif /* CONFIG_PPC_MAPLE */
diff --git a/arch/ppc64/kernel/udbg_scc.c b/arch/ppc64/kernel/udbg_scc.c
new file mode 100644
index 000000000000..74c8ea2675cb
--- /dev/null
+++ b/arch/ppc64/kernel/udbg_scc.c
@@ -0,0 +1,138 @@
1/*
2 * udbg for for zilog scc ports as found on Apple PowerMacs
3 *
4 * Copyright (C) 2001-2005 PPC 64 Team, IBM Corp
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11#include <linux/config.h>
12#include <linux/types.h>
13#include <asm/ppcdebug.h>
14#include <asm/processor.h>
15#include <asm/naca.h>
16#include <asm/uaccess.h>
17#include <asm/machdep.h>
18#include <asm/io.h>
19#include <asm/prom.h>
20#include <asm/pmac_feature.h>
21
22extern u8 real_readb(volatile u8 __iomem *addr);
23extern void real_writeb(u8 data, volatile u8 __iomem *addr);
24
25#define SCC_TXRDY 4
26#define SCC_RXRDY 1
27
28static volatile u8 __iomem *sccc;
29static volatile u8 __iomem *sccd;
30
31static void udbg_scc_putc(unsigned char c)
32{
33 if (sccc) {
34 while ((in_8(sccc) & SCC_TXRDY) == 0)
35 ;
36 out_8(sccd, c);
37 if (c == '\n')
38 udbg_scc_putc('\r');
39 }
40}
41
42static int udbg_scc_getc_poll(void)
43{
44 if (sccc) {
45 if ((in_8(sccc) & SCC_RXRDY) != 0)
46 return in_8(sccd);
47 else
48 return -1;
49 }
50 return -1;
51}
52
53static unsigned char udbg_scc_getc(void)
54{
55 if (sccc) {
56 while ((in_8(sccc) & SCC_RXRDY) == 0)
57 ;
58 return in_8(sccd);
59 }
60 return 0;
61}
62
63static unsigned char scc_inittab[] = {
64 13, 0, /* set baud rate divisor */
65 12, 0,
66 14, 1, /* baud rate gen enable, src=rtxc */
67 11, 0x50, /* clocks = br gen */
68 5, 0xea, /* tx 8 bits, assert DTR & RTS */
69 4, 0x46, /* x16 clock, 1 stop */
70 3, 0xc1, /* rx enable, 8 bits */
71};
72
73void udbg_init_scc(struct device_node *np)
74{
75 u32 *reg;
76 unsigned long addr;
77 int i, x;
78
79 if (np == NULL)
80 np = of_find_node_by_name(NULL, "escc");
81 if (np == NULL || np->parent == NULL)
82 return;
83
84 udbg_printf("found SCC...\n");
85 /* Get address within mac-io ASIC */
86 reg = (u32 *)get_property(np, "reg", NULL);
87 if (reg == NULL)
88 return;
89 addr = reg[0];
90 udbg_printf("local addr: %lx\n", addr);
91 /* Get address of mac-io PCI itself */
92 reg = (u32 *)get_property(np->parent, "assigned-addresses", NULL);
93 if (reg == NULL)
94 return;
95 addr += reg[2];
96 udbg_printf("final addr: %lx\n", addr);
97
98 /* Setup for 57600 8N1 */
99 addr += 0x20;
100 sccc = (volatile u8 * __iomem) ioremap(addr & PAGE_MASK, PAGE_SIZE) ;
101 sccc += addr & ~PAGE_MASK;
102 sccd = sccc + 0x10;
103
104 udbg_printf("ioremap result sccc: %p\n", sccc);
105 mb();
106
107 for (i = 20000; i != 0; --i)
108 x = in_8(sccc);
109 out_8(sccc, 0x09); /* reset A or B side */
110 out_8(sccc, 0xc0);
111 for (i = 0; i < sizeof(scc_inittab); ++i)
112 out_8(sccc, scc_inittab[i]);
113
114 ppc_md.udbg_putc = udbg_scc_putc;
115 ppc_md.udbg_getc = udbg_scc_getc;
116 ppc_md.udbg_getc_poll = udbg_scc_getc_poll;
117
118 udbg_puts("Hello World !\n");
119}
120
121static void udbg_real_scc_putc(unsigned char c)
122{
123 while ((real_readb(sccc) & SCC_TXRDY) == 0)
124 ;
125 real_writeb(c, sccd);
126 if (c == '\n')
127 udbg_real_scc_putc('\r');
128}
129
130void udbg_init_pmac_realmode(void)
131{
132 sccc = (volatile u8 __iomem *)0x80013020ul;
133 sccd = (volatile u8 __iomem *)0x80013030ul;
134
135 ppc_md.udbg_putc = udbg_real_scc_putc;
136 ppc_md.udbg_getc = NULL;
137 ppc_md.udbg_getc_poll = NULL;
138}
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