2 * Sonics Silicon Backplane
3 * Broadcom MIPS core driver
5 * Copyright 2005, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
8 * Licensed under the GNU/GPL. See COPYING for details.
11 #include <linux/ssb/ssb.h>
13 #include <linux/serial.h>
14 #include <linux/serial_core.h>
15 #include <linux/serial_reg.h>
16 #include <linux/time.h>
18 #include "ssb_private.h"
21 static inline u32 mips_read32(struct ssb_mipscore *mcore,
24 return ssb_read32(mcore->dev, offset);
27 static inline void mips_write32(struct ssb_mipscore *mcore,
31 ssb_write32(mcore->dev, offset, value);
34 static const u32 ipsflag_irq_mask[] = {
42 static const u32 ipsflag_irq_shift[] = {
44 SSB_IPSFLAG_IRQ1_SHIFT,
45 SSB_IPSFLAG_IRQ2_SHIFT,
46 SSB_IPSFLAG_IRQ3_SHIFT,
47 SSB_IPSFLAG_IRQ4_SHIFT,
50 static inline u32 ssb_irqflag(struct ssb_device *dev)
52 return ssb_read32(dev, SSB_TPSFLAG) & SSB_TPSFLAG_BPFLAG;
55 /* Get the MIPS IRQ assignment for a specified device.
56 * If unassigned, 0 is returned.
58 unsigned int ssb_mips_irq(struct ssb_device *dev)
60 struct ssb_bus *bus = dev->bus;
66 irqflag = ssb_irqflag(dev);
67 ipsflag = ssb_read32(bus->mipscore.dev, SSB_IPSFLAG);
68 for (irq = 1; irq <= 4; irq++) {
69 tmp = ((ipsflag & ipsflag_irq_mask[irq]) >> ipsflag_irq_shift[irq]);
79 static void clear_irq(struct ssb_bus *bus, unsigned int irq)
81 struct ssb_device *dev = bus->mipscore.dev;
83 /* Clear the IRQ in the MIPScore backplane registers */
85 ssb_write32(dev, SSB_INTVEC, 0);
87 ssb_write32(dev, SSB_IPSFLAG,
88 ssb_read32(dev, SSB_IPSFLAG) |
89 ipsflag_irq_mask[irq]);
93 static void set_irq(struct ssb_device *dev, unsigned int irq)
95 unsigned int oldirq = ssb_mips_irq(dev);
96 struct ssb_bus *bus = dev->bus;
97 struct ssb_device *mdev = bus->mipscore.dev;
98 u32 irqflag = ssb_irqflag(dev);
102 ssb_dprintk(KERN_INFO PFX
103 "set_irq: core 0x%04x, irq %d => %d\n",
104 dev->id.coreid, oldirq, irq);
105 /* clear the old irq */
107 ssb_write32(mdev, SSB_INTVEC, (~(1 << irqflag) & ssb_read32(mdev, SSB_INTVEC)));
109 clear_irq(bus, oldirq);
111 /* assign the new one */
113 ssb_write32(mdev, SSB_INTVEC, ((1 << irqflag) | ssb_read32(mdev, SSB_INTVEC)));
115 irqflag <<= ipsflag_irq_shift[irq];
116 irqflag |= (ssb_read32(mdev, SSB_IPSFLAG) & ~ipsflag_irq_mask[irq]);
117 ssb_write32(mdev, SSB_IPSFLAG, irqflag);
121 static void ssb_mips_serial_init(struct ssb_mipscore *mcore)
123 struct ssb_bus *bus = mcore->dev->bus;
126 mcore->nr_serial_ports = ssb_extif_serial_init(&bus->extif, mcore->serial_ports);
127 else if (bus->chipco.dev)
128 mcore->nr_serial_ports = ssb_chipco_serial_init(&bus->chipco, mcore->serial_ports);
130 mcore->nr_serial_ports = 0;
133 static void ssb_mips_flash_detect(struct ssb_mipscore *mcore)
135 struct ssb_bus *bus = mcore->dev->bus;
137 mcore->flash_buswidth = 2;
138 if (bus->chipco.dev) {
139 mcore->flash_window = 0x1c000000;
140 mcore->flash_window_size = 0x02000000;
141 if ((ssb_read32(bus->chipco.dev, SSB_CHIPCO_FLASH_CFG)
142 & SSB_CHIPCO_CFG_DS16) == 0)
143 mcore->flash_buswidth = 1;
145 mcore->flash_window = 0x1fc00000;
146 mcore->flash_window_size = 0x00400000;
150 u32 ssb_cpu_clock(struct ssb_mipscore *mcore)
152 struct ssb_bus *bus = mcore->dev->bus;
153 u32 pll_type, n, m, rate = 0;
155 if (bus->extif.dev) {
156 ssb_extif_get_clockcontrol(&bus->extif, &pll_type, &n, &m);
157 } else if (bus->chipco.dev) {
158 ssb_chipco_get_clockcpu(&bus->chipco, &pll_type, &n, &m);
162 if ((pll_type == SSB_PLLTYPE_5) || (bus->chip_id == 0x5365)) {
165 rate = ssb_calc_clock_rate(pll_type, n, m);
168 if (pll_type == SSB_PLLTYPE_6) {
175 void ssb_mipscore_init(struct ssb_mipscore *mcore)
178 struct ssb_device *dev;
179 unsigned long hz, ns;
183 return; /* We don't have a MIPS core */
185 ssb_dprintk(KERN_INFO PFX "Initializing MIPS core...\n");
187 bus = mcore->dev->bus;
188 hz = ssb_clockspeed(bus);
191 ns = 1000000000 / hz;
194 ssb_extif_timing_init(&bus->extif, ns);
195 else if (bus->chipco.dev)
196 ssb_chipco_timing_init(&bus->chipco, ns);
198 /* Assign IRQs to all cores on the bus, start with irq line 2, because serial usually takes 1 */
199 for (irq = 2, i = 0; i < bus->nr_devices; i++) {
200 dev = &(bus->devices[i]);
201 dev->irq = ssb_mips_irq(dev) + 2;
202 switch (dev->id.coreid) {
203 case SSB_DEV_USB11_HOST:
204 /* shouldn't need a separate irq line for non-4710, most of them have a proper
205 * external usb controller on the pci */
206 if ((bus->chip_id == 0x4710) && (irq <= 4)) {
212 case SSB_DEV_ETHERNET:
213 case SSB_DEV_ETHERNET_GBIT:
215 case SSB_DEV_USB20_HOST:
216 /* These devices get their own IRQ line if available, the rest goes on IRQ0 */
224 ssb_mips_serial_init(mcore);
225 ssb_mips_flash_detect(mcore);