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authorGreg Ungerer <gerg@uclinux.org>2011-03-21 23:39:27 -0400
committerGreg Ungerer <gerg@uclinux.org>2011-03-25 00:05:13 -0400
commit66d857b08b8c3ed5c72c361f863cce77d2a978d7 (patch)
tree47222d86f4d78dc0da31baf64188bd2e4b38ac1e /arch/m68k/platform/5272
parentd39dd11c3e6a7af5c20bfac40594db36cf270f42 (diff)
m68k: merge m68k and m68knommu arch directories
There is a lot of common code that could be shared between the m68k and m68knommu arch branches. It makes sense to merge the two branches into a single directory structure so that we can more easily share that common code. This is a brute force merge, based on a script from Stephen King <sfking@fdwdc.com>, which was originally written by Arnd Bergmann <arnd@arndb.de>. > The script was inspired by the script Sam Ravnborg used to merge the > includes from m68knommu. For those files common to both arches but > differing in content, the m68k version of the file is renamed to > <file>_mm.<ext> and the m68knommu version of the file is moved into the > corresponding m68k directory and renamed <file>_no.<ext> and a small > wrapper file <file>.<ext> is used to select between the two version. Files > that are common to both but don't differ are removed from the m68knommu > tree and files and directories that are unique to the m68knommu tree are > moved to the m68k tree. Finally, the arch/m68knommu tree is removed. > > To select between the the versions of the files, the wrapper uses > > #ifdef CONFIG_MMU > #include <file>_mm.<ext> > #else > #include <file>_no.<ext> > #endif On top of this file merge I have done a simplistic merge of m68k and m68knommu Kconfig, which primarily attempts to keep existing options and menus in place. Other than a handful of options being moved it produces identical .config outputs on m68k and m68knommu targets I tested it on. With this in place there is now quite a bit of scope for merge cleanups in future patches. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/m68k/platform/5272')
-rw-r--r--arch/m68k/platform/5272/Makefile18
-rw-r--r--arch/m68k/platform/5272/config.c176
-rw-r--r--arch/m68k/platform/5272/gpio.c81
-rw-r--r--arch/m68k/platform/5272/intc.c187
4 files changed, 462 insertions, 0 deletions
diff --git a/arch/m68k/platform/5272/Makefile b/arch/m68k/platform/5272/Makefile
new file mode 100644
index 000000000000..34110fc14301
--- /dev/null
+++ b/arch/m68k/platform/5272/Makefile
@@ -0,0 +1,18 @@
1#
2# Makefile for the linux kernel.
3#
4
5#
6# If you want to play with the HW breakpoints then you will
7# need to add define this, which will give you a stack backtrace
8# on the console port whenever a DBG interrupt occurs. You have to
9# set up you HW breakpoints to trigger a DBG interrupt:
10#
11# ccflags-y := -DTRAP_DBG_INTERRUPT
12# asflags-y := -DTRAP_DBG_INTERRUPT
13#
14
15asflags-$(CONFIG_FULLDEBUG) := -DDEBUGGER_COMPATIBLE_CACHE=1
16
17obj-y := config.o gpio.o intc.o
18
diff --git a/arch/m68k/platform/5272/config.c b/arch/m68k/platform/5272/config.c
new file mode 100644
index 000000000000..65bb582734e1
--- /dev/null
+++ b/arch/m68k/platform/5272/config.c
@@ -0,0 +1,176 @@
1/***************************************************************************/
2
3/*
4 * linux/arch/m68knommu/platform/5272/config.c
5 *
6 * Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
7 * Copyright (C) 2001-2002, SnapGear Inc. (www.snapgear.com)
8 */
9
10/***************************************************************************/
11
12#include <linux/kernel.h>
13#include <linux/param.h>
14#include <linux/init.h>
15#include <linux/io.h>
16#include <linux/phy.h>
17#include <linux/phy_fixed.h>
18#include <asm/machdep.h>
19#include <asm/coldfire.h>
20#include <asm/mcfsim.h>
21#include <asm/mcfuart.h>
22
23/***************************************************************************/
24
25/*
26 * Some platforms need software versions of the GPIO data registers.
27 */
28unsigned short ppdata;
29unsigned char ledbank = 0xff;
30
31/***************************************************************************/
32
33static struct mcf_platform_uart m5272_uart_platform[] = {
34 {
35 .mapbase = MCF_MBAR + MCFUART_BASE1,
36 .irq = MCF_IRQ_UART1,
37 },
38 {
39 .mapbase = MCF_MBAR + MCFUART_BASE2,
40 .irq = MCF_IRQ_UART2,
41 },
42 { },
43};
44
45static struct platform_device m5272_uart = {
46 .name = "mcfuart",
47 .id = 0,
48 .dev.platform_data = m5272_uart_platform,
49};
50
51static struct resource m5272_fec_resources[] = {
52 {
53 .start = MCF_MBAR + 0x840,
54 .end = MCF_MBAR + 0x840 + 0x1cf,
55 .flags = IORESOURCE_MEM,
56 },
57 {
58 .start = MCF_IRQ_ERX,
59 .end = MCF_IRQ_ERX,
60 .flags = IORESOURCE_IRQ,
61 },
62 {
63 .start = MCF_IRQ_ETX,
64 .end = MCF_IRQ_ETX,
65 .flags = IORESOURCE_IRQ,
66 },
67 {
68 .start = MCF_IRQ_ENTC,
69 .end = MCF_IRQ_ENTC,
70 .flags = IORESOURCE_IRQ,
71 },
72};
73
74static struct platform_device m5272_fec = {
75 .name = "fec",
76 .id = 0,
77 .num_resources = ARRAY_SIZE(m5272_fec_resources),
78 .resource = m5272_fec_resources,
79};
80
81static struct platform_device *m5272_devices[] __initdata = {
82 &m5272_uart,
83 &m5272_fec,
84};
85
86/***************************************************************************/
87
88static void __init m5272_uart_init_line(int line, int irq)
89{
90 u32 v;
91
92 if ((line >= 0) && (line < 2)) {
93 /* Enable the output lines for the serial ports */
94 v = readl(MCF_MBAR + MCFSIM_PBCNT);
95 v = (v & ~0x000000ff) | 0x00000055;
96 writel(v, MCF_MBAR + MCFSIM_PBCNT);
97
98 v = readl(MCF_MBAR + MCFSIM_PDCNT);
99 v = (v & ~0x000003fc) | 0x000002a8;
100 writel(v, MCF_MBAR + MCFSIM_PDCNT);
101 }
102}
103
104static void __init m5272_uarts_init(void)
105{
106 const int nrlines = ARRAY_SIZE(m5272_uart_platform);
107 int line;
108
109 for (line = 0; (line < nrlines); line++)
110 m5272_uart_init_line(line, m5272_uart_platform[line].irq);
111}
112
113/***************************************************************************/
114
115static void m5272_cpu_reset(void)
116{
117 local_irq_disable();
118 /* Set watchdog to reset, and enabled */
119 __raw_writew(0, MCF_MBAR + MCFSIM_WIRR);
120 __raw_writew(1, MCF_MBAR + MCFSIM_WRRR);
121 __raw_writew(0, MCF_MBAR + MCFSIM_WCR);
122 for (;;)
123 /* wait for watchdog to timeout */;
124}
125
126/***************************************************************************/
127
128void __init config_BSP(char *commandp, int size)
129{
130#if defined (CONFIG_MOD5272)
131 volatile unsigned char *pivrp;
132
133 /* Set base of device vectors to be 64 */
134 pivrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_PIVR);
135 *pivrp = 0x40;
136#endif
137
138#if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
139 /* Copy command line from FLASH to local buffer... */
140 memcpy(commandp, (char *) 0xf0004000, size);
141 commandp[size-1] = 0;
142#elif defined(CONFIG_CANCam)
143 /* Copy command line from FLASH to local buffer... */
144 memcpy(commandp, (char *) 0xf0010000, size);
145 commandp[size-1] = 0;
146#endif
147
148 mach_reset = m5272_cpu_reset;
149}
150
151/***************************************************************************/
152
153/*
154 * Some 5272 based boards have the FEC ethernet diectly connected to
155 * an ethernet switch. In this case we need to use the fixed phy type,
156 * and we need to declare it early in boot.
157 */
158static struct fixed_phy_status nettel_fixed_phy_status __initdata = {
159 .link = 1,
160 .speed = 100,
161 .duplex = 0,
162};
163
164/***************************************************************************/
165
166static int __init init_BSP(void)
167{
168 m5272_uarts_init();
169 fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status);
170 platform_add_devices(m5272_devices, ARRAY_SIZE(m5272_devices));
171 return 0;
172}
173
174arch_initcall(init_BSP);
175
176/***************************************************************************/
diff --git a/arch/m68k/platform/5272/gpio.c b/arch/m68k/platform/5272/gpio.c
new file mode 100644
index 000000000000..57ac10a5d7f7
--- /dev/null
+++ b/arch/m68k/platform/5272/gpio.c
@@ -0,0 +1,81 @@
1/*
2 * Coldfire generic GPIO support
3 *
4 * (C) Copyright 2009, Steven King <sfking@fdwdc.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14*/
15
16#include <linux/kernel.h>
17#include <linux/init.h>
18
19#include <asm/coldfire.h>
20#include <asm/mcfsim.h>
21#include <asm/mcfgpio.h>
22
23static struct mcf_gpio_chip mcf_gpio_chips[] = {
24 {
25 .gpio_chip = {
26 .label = "PA",
27 .request = mcf_gpio_request,
28 .free = mcf_gpio_free,
29 .direction_input = mcf_gpio_direction_input,
30 .direction_output = mcf_gpio_direction_output,
31 .get = mcf_gpio_get_value,
32 .set = mcf_gpio_set_value,
33 .ngpio = 16,
34 },
35 .pddr = (void __iomem *) MCFSIM_PADDR,
36 .podr = (void __iomem *) MCFSIM_PADAT,
37 .ppdr = (void __iomem *) MCFSIM_PADAT,
38 },
39 {
40 .gpio_chip = {
41 .label = "PB",
42 .request = mcf_gpio_request,
43 .free = mcf_gpio_free,
44 .direction_input = mcf_gpio_direction_input,
45 .direction_output = mcf_gpio_direction_output,
46 .get = mcf_gpio_get_value,
47 .set = mcf_gpio_set_value,
48 .base = 16,
49 .ngpio = 16,
50 },
51 .pddr = (void __iomem *) MCFSIM_PBDDR,
52 .podr = (void __iomem *) MCFSIM_PBDAT,
53 .ppdr = (void __iomem *) MCFSIM_PBDAT,
54 },
55 {
56 .gpio_chip = {
57 .label = "PC",
58 .request = mcf_gpio_request,
59 .free = mcf_gpio_free,
60 .direction_input = mcf_gpio_direction_input,
61 .direction_output = mcf_gpio_direction_output,
62 .get = mcf_gpio_get_value,
63 .set = mcf_gpio_set_value,
64 .base = 32,
65 .ngpio = 16,
66 },
67 .pddr = (void __iomem *) MCFSIM_PCDDR,
68 .podr = (void __iomem *) MCFSIM_PCDAT,
69 .ppdr = (void __iomem *) MCFSIM_PCDAT,
70 },
71};
72
73static int __init mcf_gpio_init(void)
74{
75 unsigned i = 0;
76 while (i < ARRAY_SIZE(mcf_gpio_chips))
77 (void)gpiochip_add((struct gpio_chip *)&mcf_gpio_chips[i++]);
78 return 0;
79}
80
81core_initcall(mcf_gpio_init);
diff --git a/arch/m68k/platform/5272/intc.c b/arch/m68k/platform/5272/intc.c
new file mode 100644
index 000000000000..969ff0a467c6
--- /dev/null
+++ b/arch/m68k/platform/5272/intc.c
@@ -0,0 +1,187 @@
1/*
2 * intc.c -- interrupt controller or ColdFire 5272 SoC
3 *
4 * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive
8 * for more details.
9 */
10
11#include <linux/types.h>
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/interrupt.h>
15#include <linux/kernel_stat.h>
16#include <linux/irq.h>
17#include <linux/io.h>
18#include <asm/coldfire.h>
19#include <asm/mcfsim.h>
20#include <asm/traps.h>
21
22/*
23 * The 5272 ColdFire interrupt controller is nothing like any other
24 * ColdFire interrupt controller - it truly is completely different.
25 * Given its age it is unlikely to be used on any other ColdFire CPU.
26 */
27
28/*
29 * The masking and priproty setting of interrupts on the 5272 is done
30 * via a set of 4 "Interrupt Controller Registers" (ICR). There is a
31 * loose mapping of vector number to register and internal bits, but
32 * a table is the easiest and quickest way to map them.
33 *
34 * Note that the external interrupts are edge triggered (unlike the
35 * internal interrupt sources which are level triggered). Which means
36 * they also need acknowledgeing via acknowledge bits.
37 */
38struct irqmap {
39 unsigned char icr;
40 unsigned char index;
41 unsigned char ack;
42};
43
44static struct irqmap intc_irqmap[MCFINT_VECMAX - MCFINT_VECBASE] = {
45 /*MCF_IRQ_SPURIOUS*/ { .icr = 0, .index = 0, .ack = 0, },
46 /*MCF_IRQ_EINT1*/ { .icr = MCFSIM_ICR1, .index = 28, .ack = 1, },
47 /*MCF_IRQ_EINT2*/ { .icr = MCFSIM_ICR1, .index = 24, .ack = 1, },
48 /*MCF_IRQ_EINT3*/ { .icr = MCFSIM_ICR1, .index = 20, .ack = 1, },
49 /*MCF_IRQ_EINT4*/ { .icr = MCFSIM_ICR1, .index = 16, .ack = 1, },
50 /*MCF_IRQ_TIMER1*/ { .icr = MCFSIM_ICR1, .index = 12, .ack = 0, },
51 /*MCF_IRQ_TIMER2*/ { .icr = MCFSIM_ICR1, .index = 8, .ack = 0, },
52 /*MCF_IRQ_TIMER3*/ { .icr = MCFSIM_ICR1, .index = 4, .ack = 0, },
53 /*MCF_IRQ_TIMER4*/ { .icr = MCFSIM_ICR1, .index = 0, .ack = 0, },
54 /*MCF_IRQ_UART1*/ { .icr = MCFSIM_ICR2, .index = 28, .ack = 0, },
55 /*MCF_IRQ_UART2*/ { .icr = MCFSIM_ICR2, .index = 24, .ack = 0, },
56 /*MCF_IRQ_PLIP*/ { .icr = MCFSIM_ICR2, .index = 20, .ack = 0, },
57 /*MCF_IRQ_PLIA*/ { .icr = MCFSIM_ICR2, .index = 16, .ack = 0, },
58 /*MCF_IRQ_USB0*/ { .icr = MCFSIM_ICR2, .index = 12, .ack = 0, },
59 /*MCF_IRQ_USB1*/ { .icr = MCFSIM_ICR2, .index = 8, .ack = 0, },
60 /*MCF_IRQ_USB2*/ { .icr = MCFSIM_ICR2, .index = 4, .ack = 0, },
61 /*MCF_IRQ_USB3*/ { .icr = MCFSIM_ICR2, .index = 0, .ack = 0, },
62 /*MCF_IRQ_USB4*/ { .icr = MCFSIM_ICR3, .index = 28, .ack = 0, },
63 /*MCF_IRQ_USB5*/ { .icr = MCFSIM_ICR3, .index = 24, .ack = 0, },
64 /*MCF_IRQ_USB6*/ { .icr = MCFSIM_ICR3, .index = 20, .ack = 0, },
65 /*MCF_IRQ_USB7*/ { .icr = MCFSIM_ICR3, .index = 16, .ack = 0, },
66 /*MCF_IRQ_DMA*/ { .icr = MCFSIM_ICR3, .index = 12, .ack = 0, },
67 /*MCF_IRQ_ERX*/ { .icr = MCFSIM_ICR3, .index = 8, .ack = 0, },
68 /*MCF_IRQ_ETX*/ { .icr = MCFSIM_ICR3, .index = 4, .ack = 0, },
69 /*MCF_IRQ_ENTC*/ { .icr = MCFSIM_ICR3, .index = 0, .ack = 0, },
70 /*MCF_IRQ_QSPI*/ { .icr = MCFSIM_ICR4, .index = 28, .ack = 0, },
71 /*MCF_IRQ_EINT5*/ { .icr = MCFSIM_ICR4, .index = 24, .ack = 1, },
72 /*MCF_IRQ_EINT6*/ { .icr = MCFSIM_ICR4, .index = 20, .ack = 1, },
73 /*MCF_IRQ_SWTO*/ { .icr = MCFSIM_ICR4, .index = 16, .ack = 0, },
74};
75
76/*
77 * The act of masking the interrupt also has a side effect of 'ack'ing
78 * an interrupt on this irq (for the external irqs). So this mask function
79 * is also an ack_mask function.
80 */
81static void intc_irq_mask(struct irq_data *d)
82{
83 unsigned int irq = d->irq;
84
85 if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECMAX)) {
86 u32 v;
87 irq -= MCFINT_VECBASE;
88 v = 0x8 << intc_irqmap[irq].index;
89 writel(v, MCF_MBAR + intc_irqmap[irq].icr);
90 }
91}
92
93static void intc_irq_unmask(struct irq_data *d)
94{
95 unsigned int irq = d->irq;
96
97 if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECMAX)) {
98 u32 v;
99 irq -= MCFINT_VECBASE;
100 v = 0xd << intc_irqmap[irq].index;
101 writel(v, MCF_MBAR + intc_irqmap[irq].icr);
102 }
103}
104
105static void intc_irq_ack(struct irq_data *d)
106{
107 unsigned int irq = d->irq;
108
109 /* Only external interrupts are acked */
110 if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECMAX)) {
111 irq -= MCFINT_VECBASE;
112 if (intc_irqmap[irq].ack) {
113 u32 v;
114 v = readl(MCF_MBAR + intc_irqmap[irq].icr);
115 v &= (0x7 << intc_irqmap[irq].index);
116 v |= (0x8 << intc_irqmap[irq].index);
117 writel(v, MCF_MBAR + intc_irqmap[irq].icr);
118 }
119 }
120}
121
122static int intc_irq_set_type(struct irq_data *d, unsigned int type)
123{
124 unsigned int irq = d->irq;
125
126 if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECMAX)) {
127 irq -= MCFINT_VECBASE;
128 if (intc_irqmap[irq].ack) {
129 u32 v;
130 v = readl(MCF_MBAR + MCFSIM_PITR);
131 if (type == IRQ_TYPE_EDGE_FALLING)
132 v &= ~(0x1 << (32 - irq));
133 else
134 v |= (0x1 << (32 - irq));
135 writel(v, MCF_MBAR + MCFSIM_PITR);
136 }
137 }
138 return 0;
139}
140
141/*
142 * Simple flow handler to deal with the external edge triggered interrupts.
143 * We need to be careful with the masking/acking due to the side effects
144 * of masking an interrupt.
145 */
146static void intc_external_irq(unsigned int irq, struct irq_desc *desc)
147{
148 get_irq_desc_chip(desc)->irq_ack(&desc->irq_data);
149 handle_simple_irq(irq, desc);
150}
151
152static struct irq_chip intc_irq_chip = {
153 .name = "CF-INTC",
154 .irq_mask = intc_irq_mask,
155 .irq_unmask = intc_irq_unmask,
156 .irq_mask_ack = intc_irq_mask,
157 .irq_ack = intc_irq_ack,
158 .irq_set_type = intc_irq_set_type,
159};
160
161void __init init_IRQ(void)
162{
163 int irq, edge;
164
165 init_vectors();
166
167 /* Mask all interrupt sources */
168 writel(0x88888888, MCF_MBAR + MCFSIM_ICR1);
169 writel(0x88888888, MCF_MBAR + MCFSIM_ICR2);
170 writel(0x88888888, MCF_MBAR + MCFSIM_ICR3);
171 writel(0x88888888, MCF_MBAR + MCFSIM_ICR4);
172
173 for (irq = 0; (irq < NR_IRQS); irq++) {
174 set_irq_chip(irq, &intc_irq_chip);
175 edge = 0;
176 if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECMAX))
177 edge = intc_irqmap[irq - MCFINT_VECBASE].ack;
178 if (edge) {
179 set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
180 set_irq_handler(irq, intc_external_irq);
181 } else {
182 set_irq_type(irq, IRQ_TYPE_LEVEL_HIGH);
183 set_irq_handler(irq, handle_level_irq);
184 }
185 }
186}
187
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