1 /**************************************************************************
3 * BRIEF MODULE DESCRIPTION
4 * PCI init for Ralink RT2880 solution
6 * Copyright 2007 Ralink Inc. (bruce_chang@ralinktech.com.tw)
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
14 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
16 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
19 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 675 Mass Ave, Cambridge, MA 02139, USA.
29 **************************************************************************
30 * May 2007 Bruce Chang
33 * May 2009 Bruce Chang
34 * support RT2880/RT3883 PCIe
36 * May 2011 Bruce Chang
37 * support RT6855/MT7620 PCIe
39 **************************************************************************
42 #include <linux/types.h>
43 #include <linux/pci.h>
44 #include <linux/kernel.h>
45 #include <linux/slab.h>
46 #include <linux/version.h>
49 #include <asm/mips-cm.h>
50 #include <linux/init.h>
51 #include <linux/module.h>
52 #include <linux/delay.h>
54 #include <linux/of_pci.h>
55 #include <linux/of_irq.h>
56 #include <linux/platform_device.h>
58 #include <ralink_regs.h>
60 extern void pcie_phy_init(void);
61 extern void chk_phy_pll(void);
64 * These functions and structures provide the BIOS scan and mapping of the PCI
68 #define CONFIG_PCIE_PORT0
69 #define CONFIG_PCIE_PORT1
70 #define CONFIG_PCIE_PORT2
71 #define RALINK_PCIE0_CLK_EN (1<<24)
72 #define RALINK_PCIE1_CLK_EN (1<<25)
73 #define RALINK_PCIE2_CLK_EN (1<<26)
75 #define RALINK_PCI_CONFIG_ADDR 0x20
76 #define RALINK_PCI_CONFIG_DATA_VIRTUAL_REG 0x24
77 #define RALINK_INT_PCIE0 pcie_irq[0]
78 #define RALINK_INT_PCIE1 pcie_irq[1]
79 #define RALINK_INT_PCIE2 pcie_irq[2]
80 #define RALINK_PCI_MEMBASE *(volatile u32 *)(RALINK_PCI_BASE + 0x0028)
81 #define RALINK_PCI_IOBASE *(volatile u32 *)(RALINK_PCI_BASE + 0x002C)
82 #define RALINK_PCIE0_RST (1<<24)
83 #define RALINK_PCIE1_RST (1<<25)
84 #define RALINK_PCIE2_RST (1<<26)
85 #define RALINK_SYSCTL_BASE 0xBE000000
87 #define RALINK_PCI_PCICFG_ADDR *(volatile u32 *)(RALINK_PCI_BASE + 0x0000)
88 #define RALINK_PCI_PCIMSK_ADDR *(volatile u32 *)(RALINK_PCI_BASE + 0x000C)
89 #define RALINK_PCI_BASE 0xBE140000
91 #define RALINK_PCIEPHY_P0P1_CTL_OFFSET (RALINK_PCI_BASE + 0x9000)
92 #define RT6855_PCIE0_OFFSET 0x2000
93 #define RT6855_PCIE1_OFFSET 0x3000
94 #define RT6855_PCIE2_OFFSET 0x4000
96 #define RALINK_PCI0_BAR0SETUP_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0010)
97 #define RALINK_PCI0_IMBASEBAR0_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0018)
98 #define RALINK_PCI0_ID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0030)
99 #define RALINK_PCI0_CLASS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0034)
100 #define RALINK_PCI0_SUBID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0038)
101 #define RALINK_PCI0_STATUS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0050)
102 #define RALINK_PCI0_DERR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0060)
103 #define RALINK_PCI0_ECRC *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0064)
105 #define RALINK_PCI1_BAR0SETUP_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0010)
106 #define RALINK_PCI1_IMBASEBAR0_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0018)
107 #define RALINK_PCI1_ID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0030)
108 #define RALINK_PCI1_CLASS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0034)
109 #define RALINK_PCI1_SUBID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0038)
110 #define RALINK_PCI1_STATUS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0050)
111 #define RALINK_PCI1_DERR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0060)
112 #define RALINK_PCI1_ECRC *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0064)
114 #define RALINK_PCI2_BAR0SETUP_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0010)
115 #define RALINK_PCI2_IMBASEBAR0_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0018)
116 #define RALINK_PCI2_ID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0030)
117 #define RALINK_PCI2_CLASS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0034)
118 #define RALINK_PCI2_SUBID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0038)
119 #define RALINK_PCI2_STATUS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0050)
120 #define RALINK_PCI2_DERR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0060)
121 #define RALINK_PCI2_ECRC *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0064)
123 #define RALINK_PCIEPHY_P0P1_CTL_OFFSET (RALINK_PCI_BASE + 0x9000)
124 #define RALINK_PCIEPHY_P2_CTL_OFFSET (RALINK_PCI_BASE + 0xA000)
127 #define MV_WRITE(ofs, data) \
128 *(volatile u32 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le32(data)
129 #define MV_READ(ofs, data) \
130 *(data) = le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
131 #define MV_READ_DATA(ofs) \
132 le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
134 #define MV_WRITE_16(ofs, data) \
135 *(volatile u16 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le16(data)
136 #define MV_READ_16(ofs, data) \
137 *(data) = le16_to_cpu(*(volatile u16 *)(RALINK_PCI_BASE+(ofs)))
139 #define MV_WRITE_8(ofs, data) \
140 *(volatile u8 *)(RALINK_PCI_BASE+(ofs)) = data
141 #define MV_READ_8(ofs, data) \
142 *(data) = *(volatile u8 *)(RALINK_PCI_BASE+(ofs))
146 #define RALINK_PCI_MM_MAP_BASE 0x60000000
147 #define RALINK_PCI_IO_MAP_BASE 0x1e160000
149 #define RALINK_SYSTEM_CONTROL_BASE 0xbe000000
151 #define ASSERT_SYSRST_PCIE(val) do { \
152 if (*(unsigned int *)(0xbe00000c) == 0x00030101) \
153 RALINK_RSTCTRL |= val; \
155 RALINK_RSTCTRL &= ~val; \
157 #define DEASSERT_SYSRST_PCIE(val) do { \
158 if (*(unsigned int *)(0xbe00000c) == 0x00030101) \
159 RALINK_RSTCTRL &= ~val; \
161 RALINK_RSTCTRL |= val; \
163 #define RALINK_SYSCFG1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x14)
164 #define RALINK_CLKCFG1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x30)
165 #define RALINK_RSTCTRL *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x34)
166 #define RALINK_GPIOMODE *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x60)
167 #define RALINK_PCIE_CLK_GEN *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x7c)
168 #define RALINK_PCIE_CLK_GEN1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x80)
169 #define PPLL_CFG1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x9c)
170 #define PPLL_DRV *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0xa0)
172 #define RALINK_PCI_HOST_MODE_EN (1<<7)
173 #define RALINK_PCIE_RC_MODE_EN (1<<8)
175 #define RALINK_PCIE_RST (1<<23)
176 #define RALINK_PCI_RST (1<<24)
178 #define RALINK_PCI_CLK_EN (1<<19)
179 #define RALINK_PCIE_CLK_EN (1<<21)
180 //RALINK_GPIOMODE bit
181 #define PCI_SLOTx2 (1<<11)
182 #define PCI_SLOTx1 (2<<11)
184 #define PDRV_SW_SET (1<<31)
185 #define LC_CKDRVPD_ (1<<19)
187 #define MEMORY_BASE 0x0
188 static int pcie_link_status
= 0;
190 #define PCI_ACCESS_READ_1 0
191 #define PCI_ACCESS_READ_2 1
192 #define PCI_ACCESS_READ_4 2
193 #define PCI_ACCESS_WRITE_1 3
194 #define PCI_ACCESS_WRITE_2 4
195 #define PCI_ACCESS_WRITE_4 5
197 static int pcie_irq
[3];
199 static int config_access(unsigned char access_type
, struct pci_bus
*bus
,
200 unsigned int devfn
, unsigned int where
, u32
* data
)
202 unsigned int slot
= PCI_SLOT(devfn
);
203 u8 func
= PCI_FUNC(devfn
);
204 uint32_t address_reg
, data_reg
;
205 unsigned int address
;
207 address_reg
= RALINK_PCI_CONFIG_ADDR
;
208 data_reg
= RALINK_PCI_CONFIG_DATA_VIRTUAL_REG
;
210 address
= (((where
&0xF00)>>8)<<24) |(bus
->number
<< 16) | (slot
<< 11) | (func
<< 8) | (where
& 0xfc) | 0x80000000;
211 MV_WRITE(address_reg
, address
);
213 switch(access_type
) {
214 case PCI_ACCESS_WRITE_1
:
215 MV_WRITE_8(data_reg
+(where
&0x3), *data
);
217 case PCI_ACCESS_WRITE_2
:
218 MV_WRITE_16(data_reg
+(where
&0x3), *data
);
220 case PCI_ACCESS_WRITE_4
:
221 MV_WRITE(data_reg
, *data
);
223 case PCI_ACCESS_READ_1
:
224 MV_READ_8( data_reg
+(where
&0x3), data
);
226 case PCI_ACCESS_READ_2
:
227 MV_READ_16(data_reg
+(where
&0x3), data
);
229 case PCI_ACCESS_READ_4
:
230 MV_READ(data_reg
, data
);
233 printk("no specify access type\n");
240 read_config_byte(struct pci_bus
*bus
, unsigned int devfn
, int where
, u8
* val
)
242 return config_access(PCI_ACCESS_READ_1
, bus
, devfn
, (unsigned int)where
, (u32
*)val
);
246 read_config_word(struct pci_bus
*bus
, unsigned int devfn
, int where
, u16
* val
)
248 return config_access(PCI_ACCESS_READ_2
, bus
, devfn
, (unsigned int)where
, (u32
*)val
);
252 read_config_dword(struct pci_bus
*bus
, unsigned int devfn
, int where
, u32
* val
)
254 return config_access(PCI_ACCESS_READ_4
, bus
, devfn
, (unsigned int)where
, (u32
*)val
);
258 write_config_byte(struct pci_bus
*bus
, unsigned int devfn
, int where
, u8 val
)
260 if (config_access(PCI_ACCESS_WRITE_1
, bus
, devfn
, (unsigned int)where
, (u32
*)&val
))
263 return PCIBIOS_SUCCESSFUL
;
267 write_config_word(struct pci_bus
*bus
, unsigned int devfn
, int where
, u16 val
)
269 if (config_access(PCI_ACCESS_WRITE_2
, bus
, devfn
, where
, (u32
*)&val
))
272 return PCIBIOS_SUCCESSFUL
;
276 write_config_dword(struct pci_bus
*bus
, unsigned int devfn
, int where
, u32 val
)
278 if (config_access(PCI_ACCESS_WRITE_4
, bus
, devfn
, where
, &val
))
281 return PCIBIOS_SUCCESSFUL
;
286 pci_config_read(struct pci_bus
*bus
, unsigned int devfn
, int where
, int size
, u32
* val
)
290 return read_config_byte(bus
, devfn
, where
, (u8
*) val
);
292 return read_config_word(bus
, devfn
, where
, (u16
*) val
);
294 return read_config_dword(bus
, devfn
, where
, val
);
299 pci_config_write(struct pci_bus
*bus
, unsigned int devfn
, int where
, int size
, u32 val
)
303 return write_config_byte(bus
, devfn
, where
, (u8
) val
);
305 return write_config_word(bus
, devfn
, where
, (u16
) val
);
307 return write_config_dword(bus
, devfn
, where
, val
);
311 struct pci_ops mt7621_pci_ops
= {
312 .read
= pci_config_read
,
313 .write
= pci_config_write
,
316 static struct resource mt7621_res_pci_mem1
= {
318 .start
= RALINK_PCI_MM_MAP_BASE
,
319 .end
= (u32
)((RALINK_PCI_MM_MAP_BASE
+ (unsigned char *)0x0fffffff)),
320 .flags
= IORESOURCE_MEM
,
322 static struct resource mt7621_res_pci_io1
= {
324 .start
= RALINK_PCI_IO_MAP_BASE
,
325 .end
= (u32
)((RALINK_PCI_IO_MAP_BASE
+ (unsigned char *)0x0ffff)),
326 .flags
= IORESOURCE_IO
,
329 static struct pci_controller mt7621_controller
= {
330 .pci_ops
= &mt7621_pci_ops
,
331 .mem_resource
= &mt7621_res_pci_mem1
,
332 .io_resource
= &mt7621_res_pci_io1
,
333 .mem_offset
= 0x00000000UL
,
334 .io_offset
= 0x00000000UL
,
335 .io_map_base
= 0xa0000000,
339 read_config(unsigned long bus
, unsigned long dev
, unsigned long func
, unsigned long reg
, unsigned long *val
)
341 unsigned int address_reg
, data_reg
, address
;
343 address_reg
= RALINK_PCI_CONFIG_ADDR
;
344 data_reg
= RALINK_PCI_CONFIG_DATA_VIRTUAL_REG
;
345 address
= (((reg
& 0xF00)>>8)<<24) | (bus
<< 16) | (dev
<< 11) | (func
<< 8) | (reg
& 0xfc) | 0x80000000 ;
346 MV_WRITE(address_reg
, address
);
347 MV_READ(data_reg
, val
);
352 write_config(unsigned long bus
, unsigned long dev
, unsigned long func
, unsigned long reg
, unsigned long val
)
354 unsigned int address_reg
, data_reg
, address
;
356 address_reg
= RALINK_PCI_CONFIG_ADDR
;
357 data_reg
= RALINK_PCI_CONFIG_DATA_VIRTUAL_REG
;
358 address
= (((reg
& 0xF00)>>8)<<24) | (bus
<< 16) | (dev
<< 11) | (func
<< 8) | (reg
& 0xfc) | 0x80000000 ;
359 MV_WRITE(address_reg
, address
);
360 MV_WRITE(data_reg
, val
);
366 pcibios_map_irq(const struct pci_dev
*dev
, u8 slot
, u8 pin
)
372 if ((dev
->bus
->number
== 0) && (slot
== 0)) {
373 write_config(0, 0, 0, PCI_BASE_ADDRESS_0
, MEMORY_BASE
);
374 read_config(0, 0, 0, PCI_BASE_ADDRESS_0
, (unsigned long *)&val
);
375 printk("BAR0 at slot 0 = %x\n", val
);
376 printk("bus=0x%x, slot = 0x%x\n",dev
->bus
->number
, slot
);
377 } else if((dev
->bus
->number
== 0) && (slot
== 0x1)) {
378 write_config(0, 1, 0, PCI_BASE_ADDRESS_0
, MEMORY_BASE
);
379 read_config(0, 1, 0, PCI_BASE_ADDRESS_0
, (unsigned long *)&val
);
380 printk("BAR0 at slot 1 = %x\n", val
);
381 printk("bus=0x%x, slot = 0x%x\n",dev
->bus
->number
, slot
);
382 } else if((dev
->bus
->number
== 0) && (slot
== 0x2)) {
383 write_config(0, 2, 0, PCI_BASE_ADDRESS_0
, MEMORY_BASE
);
384 read_config(0, 2, 0, PCI_BASE_ADDRESS_0
, (unsigned long *)&val
);
385 printk("BAR0 at slot 2 = %x\n", val
);
386 printk("bus=0x%x, slot = 0x%x\n",dev
->bus
->number
, slot
);
387 } else if ((dev
->bus
->number
== 1) && (slot
== 0x0)) {
388 switch (pcie_link_status
) {
391 irq
= RALINK_INT_PCIE1
;
394 irq
= RALINK_INT_PCIE2
;
397 irq
= RALINK_INT_PCIE0
;
399 printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev
->bus
->number
, slot
, dev
->irq
);
400 } else if ((dev
->bus
->number
== 2) && (slot
== 0x0)) {
401 switch (pcie_link_status
) {
404 irq
= RALINK_INT_PCIE2
;
407 irq
= RALINK_INT_PCIE1
;
409 printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev
->bus
->number
, slot
, dev
->irq
);
410 } else if ((dev
->bus
->number
== 2) && (slot
== 0x1)) {
411 switch (pcie_link_status
) {
414 irq
= RALINK_INT_PCIE2
;
417 irq
= RALINK_INT_PCIE1
;
419 printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev
->bus
->number
, slot
, dev
->irq
);
420 } else if ((dev
->bus
->number
==3) && (slot
== 0x0)) {
421 irq
= RALINK_INT_PCIE2
;
422 printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev
->bus
->number
, slot
, dev
->irq
);
423 } else if ((dev
->bus
->number
==3) && (slot
== 0x1)) {
424 irq
= RALINK_INT_PCIE2
;
425 printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev
->bus
->number
, slot
, dev
->irq
);
426 } else if ((dev
->bus
->number
==3) && (slot
== 0x2)) {
427 irq
= RALINK_INT_PCIE2
;
428 printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev
->bus
->number
, slot
, dev
->irq
);
430 printk("bus=0x%x, slot = 0x%x\n",dev
->bus
->number
, slot
);
434 pci_write_config_byte(dev
, PCI_CACHE_LINE_SIZE
, 0x14); //configure cache line size 0x14
435 pci_write_config_byte(dev
, PCI_LATENCY_TIMER
, 0xFF); //configure latency timer 0x10
436 pci_read_config_word(dev
, PCI_COMMAND
, &cmd
);
437 cmd
= cmd
| PCI_COMMAND_MASTER
| PCI_COMMAND_IO
| PCI_COMMAND_MEMORY
;
438 pci_write_config_word(dev
, PCI_COMMAND
, cmd
);
439 pci_write_config_byte(dev
, PCI_INTERRUPT_LINE
, irq
);
444 set_pcie_phy(u32
*addr
, int start_b
, int bits
, int val
)
446 // printk("0x%p:", addr);
447 // printk(" %x", *addr);
448 *(unsigned int *)(addr
) &= ~(((1<<bits
) - 1)<<start_b
);
449 *(unsigned int *)(addr
) |= val
<< start_b
;
450 // printk(" -> %x\n", *addr);
454 bypass_pipe_rst(void)
456 #if defined (CONFIG_PCIE_PORT0)
458 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x02c), 12, 1, 0x01); // rg_pe1_pipe_rst_b
459 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x02c), 4, 1, 0x01); // rg_pe1_pipe_cmd_frc[4]
461 #if defined (CONFIG_PCIE_PORT1)
463 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x12c), 12, 1, 0x01); // rg_pe1_pipe_rst_b
464 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x12c), 4, 1, 0x01); // rg_pe1_pipe_cmd_frc[4]
466 #if defined (CONFIG_PCIE_PORT2)
468 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x02c), 12, 1, 0x01); // rg_pe1_pipe_rst_b
469 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x02c), 4, 1, 0x01); // rg_pe1_pipe_cmd_frc[4]
474 set_phy_for_ssc(void)
476 unsigned long reg
= (*(volatile u32
*)(RALINK_SYSCTL_BASE
+ 0x10));
478 reg
= (reg
>> 6) & 0x7;
479 #if defined (CONFIG_PCIE_PORT0) || defined (CONFIG_PCIE_PORT1)
480 /* Set PCIe Port0 & Port1 PHY to disable SSC */
481 /* Debug Xtal Type */
482 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x400), 8, 1, 0x01); // rg_pe1_frc_h_xtal_type
483 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x400), 9, 2, 0x00); // rg_pe1_h_xtal_type
484 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x000), 4, 1, 0x01); // rg_pe1_frc_phy_en //Force Port 0 enable control
485 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x100), 4, 1, 0x01); // rg_pe1_frc_phy_en //Force Port 1 enable control
486 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x000), 5, 1, 0x00); // rg_pe1_phy_en //Port 0 disable
487 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x100), 5, 1, 0x00); // rg_pe1_phy_en //Port 1 disable
488 if(reg
<= 5 && reg
>= 3) { // 40MHz Xtal
489 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 6, 2, 0x01); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
490 printk("***** Xtal 40MHz *****\n");
491 } else { // 25MHz | 20MHz Xtal
492 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 6, 2, 0x00); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
494 printk("***** Xtal 25MHz *****\n");
495 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4bc), 4, 2, 0x01); // RG_PE1_H_PLL_FBKSEL //Feedback clock select
496 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x49c), 0,31, 0x18000000); // RG_PE1_H_LCDDS_PCW_NCPO //DDS NCPO PCW (for host mode)
497 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4a4), 0,16, 0x18d); // RG_PE1_H_LCDDS_SSC_PRD //DDS SSC dither period control
498 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4a8), 0,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA //DDS SSC dither amplitude control
499 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4a8), 16,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA1 //DDS SSC dither amplitude control for initial
501 printk("***** Xtal 20MHz *****\n");
504 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4a0), 5, 1, 0x01); // RG_PE1_LCDDS_CLK_PH_INV //DDS clock inversion
505 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 22, 2, 0x02); // RG_PE1_H_PLL_BC
506 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 18, 4, 0x06); // RG_PE1_H_PLL_BP
507 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 12, 4, 0x02); // RG_PE1_H_PLL_IR
508 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 8, 4, 0x01); // RG_PE1_H_PLL_IC
509 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4ac), 16, 3, 0x00); // RG_PE1_H_PLL_BR
510 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 1, 3, 0x02); // RG_PE1_PLL_DIVEN
511 if(reg
<= 5 && reg
>= 3) { // 40MHz Xtal
512 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x414), 6, 2, 0x01); // rg_pe1_mstckdiv //value of da_pe1_mstckdiv when force mode enable
513 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x414), 5, 1, 0x01); // rg_pe1_frc_mstckdiv //force mode enable of da_pe1_mstckdiv
515 /* Enable PHY and disable force mode */
516 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x000), 5, 1, 0x01); // rg_pe1_phy_en //Port 0 enable
517 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x100), 5, 1, 0x01); // rg_pe1_phy_en //Port 1 enable
518 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x000), 4, 1, 0x00); // rg_pe1_frc_phy_en //Force Port 0 disable control
519 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x100), 4, 1, 0x00); // rg_pe1_frc_phy_en //Force Port 1 disable control
521 #if defined (CONFIG_PCIE_PORT2)
522 /* Set PCIe Port2 PHY to disable SSC */
523 /* Debug Xtal Type */
524 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x400), 8, 1, 0x01); // rg_pe1_frc_h_xtal_type
525 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x400), 9, 2, 0x00); // rg_pe1_h_xtal_type
526 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x000), 4, 1, 0x01); // rg_pe1_frc_phy_en //Force Port 0 enable control
527 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x000), 5, 1, 0x00); // rg_pe1_phy_en //Port 0 disable
528 if(reg
<= 5 && reg
>= 3) { // 40MHz Xtal
529 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 6, 2, 0x01); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
530 } else { // 25MHz | 20MHz Xtal
531 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 6, 2, 0x00); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
532 if (reg
>= 6) { // 25MHz Xtal
533 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4bc), 4, 2, 0x01); // RG_PE1_H_PLL_FBKSEL //Feedback clock select
534 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x49c), 0,31, 0x18000000); // RG_PE1_H_LCDDS_PCW_NCPO //DDS NCPO PCW (for host mode)
535 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4a4), 0,16, 0x18d); // RG_PE1_H_LCDDS_SSC_PRD //DDS SSC dither period control
536 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4a8), 0,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA //DDS SSC dither amplitude control
537 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4a8), 16,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA1 //DDS SSC dither amplitude control for initial
540 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4a0), 5, 1, 0x01); // RG_PE1_LCDDS_CLK_PH_INV //DDS clock inversion
541 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 22, 2, 0x02); // RG_PE1_H_PLL_BC
542 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 18, 4, 0x06); // RG_PE1_H_PLL_BP
543 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 12, 4, 0x02); // RG_PE1_H_PLL_IR
544 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 8, 4, 0x01); // RG_PE1_H_PLL_IC
545 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4ac), 16, 3, 0x00); // RG_PE1_H_PLL_BR
546 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 1, 3, 0x02); // RG_PE1_PLL_DIVEN
547 if(reg
<= 5 && reg
>= 3) { // 40MHz Xtal
548 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x414), 6, 2, 0x01); // rg_pe1_mstckdiv //value of da_pe1_mstckdiv when force mode enable
549 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x414), 5, 1, 0x01); // rg_pe1_frc_mstckdiv //force mode enable of da_pe1_mstckdiv
551 /* Enable PHY and disable force mode */
552 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x000), 5, 1, 0x01); // rg_pe1_phy_en //Port 0 enable
553 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x000), 4, 1, 0x00); // rg_pe1_frc_phy_en //Force Port 0 disable control
557 void setup_cm_memory_region(struct resource
*mem_resource
)
559 resource_size_t mask
;
560 if (mips_cps_numiocu(0)) {
561 /* FIXME: hardware doesn't accept mask values with 1s after
562 0s (e.g. 0xffef), so it would be great to warn if that's
564 mask
= ~(mem_resource
->end
- mem_resource
->start
);
566 write_gcr_reg1_base(mem_resource
->start
);
567 write_gcr_reg1_mask(mask
| CM_GCR_REGn_MASK_CMTGT_IOCU0
);
568 printk("PCI coherence region base: 0x%08lx, mask/settings: 0x%08lx\n",
569 read_gcr_reg1_base(),
570 read_gcr_reg1_mask());
574 static int mt7621_pci_probe(struct platform_device
*pdev
)
576 unsigned long val
= 0;
579 for (i
= 0; i
< 3; i
++)
580 pcie_irq
[i
] = irq_of_parse_and_map(pdev
->dev
.of_node
, i
);
582 iomem_resource
.start
= 0;
583 iomem_resource
.end
= ~0;
584 ioport_resource
.start
= 0;
585 ioport_resource
.end
= ~0;
587 #if defined (CONFIG_PCIE_PORT0)
588 val
= RALINK_PCIE0_RST
;
590 #if defined (CONFIG_PCIE_PORT1)
591 val
|= RALINK_PCIE1_RST
;
593 #if defined (CONFIG_PCIE_PORT2)
594 val
|= RALINK_PCIE2_RST
;
596 ASSERT_SYSRST_PCIE(RALINK_PCIE0_RST
| RALINK_PCIE1_RST
| RALINK_PCIE2_RST
);
597 printk("pull PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL
);
598 #if defined GPIO_PERST /* add GPIO control instead of PERST_N */ /*chhung*/
599 *(unsigned int *)(0xbe000060) &= ~(0x3<<10 | 0x3<<3);
600 *(unsigned int *)(0xbe000060) |= 0x1<<10 | 0x1<<3;
602 *(unsigned int *)(0xbe000600) |= 0x1<<19 | 0x1<<8 | 0x1<<7; // use GPIO19/GPIO8/GPIO7 (PERST_N/UART_RXD3/UART_TXD3)
604 *(unsigned int *)(0xbe000620) &= ~(0x1<<19 | 0x1<<8 | 0x1<<7); // clear DATA
608 *(unsigned int *)(0xbe000060) &= ~0x00000c00;
610 #if defined (CONFIG_PCIE_PORT0)
611 val
= RALINK_PCIE0_RST
;
613 #if defined (CONFIG_PCIE_PORT1)
614 val
|= RALINK_PCIE1_RST
;
616 #if defined (CONFIG_PCIE_PORT2)
617 val
|= RALINK_PCIE2_RST
;
619 DEASSERT_SYSRST_PCIE(val
);
620 printk("release PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL
);
622 if ((*(unsigned int *)(0xbe00000c)&0xFFFF) == 0x0101) // MT7621 E2
625 printk("release PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL
);
627 #if defined (CONFIG_PCIE_PORT0)
628 read_config(0, 0, 0, 0x70c, &val
);
629 printk("Port 0 N_FTS = %x\n", (unsigned int)val
);
631 #if defined (CONFIG_PCIE_PORT1)
632 read_config(0, 1, 0, 0x70c, &val
);
633 printk("Port 1 N_FTS = %x\n", (unsigned int)val
);
635 #if defined (CONFIG_PCIE_PORT2)
636 read_config(0, 2, 0, 0x70c, &val
);
637 printk("Port 2 N_FTS = %x\n", (unsigned int)val
);
640 RALINK_RSTCTRL
= (RALINK_RSTCTRL
| RALINK_PCIE_RST
);
641 RALINK_SYSCFG1
&= ~(0x30);
642 RALINK_SYSCFG1
|= (2<<4);
643 RALINK_PCIE_CLK_GEN
&= 0x7fffffff;
644 RALINK_PCIE_CLK_GEN1
&= 0x80ffffff;
645 RALINK_PCIE_CLK_GEN1
|= 0xa << 24;
646 RALINK_PCIE_CLK_GEN
|= 0x80000000;
648 RALINK_RSTCTRL
= (RALINK_RSTCTRL
& ~RALINK_PCIE_RST
);
651 #if defined GPIO_PERST /* add GPIO control instead of PERST_N */ /*chhung*/
652 *(unsigned int *)(0xbe000620) |= 0x1<<19 | 0x1<<8 | 0x1<<7; // set DATA
655 RALINK_PCI_PCICFG_ADDR
&= ~(1<<1); //de-assert PERST
661 #if defined (CONFIG_PCIE_PORT0)
662 if(( RALINK_PCI0_STATUS
& 0x1) == 0)
664 printk("PCIE0 no card, disable it(RST&CLK)\n");
665 ASSERT_SYSRST_PCIE(RALINK_PCIE0_RST
);
666 RALINK_CLKCFG1
= (RALINK_CLKCFG1
& ~RALINK_PCIE0_CLK_EN
);
667 pcie_link_status
&= ~(1<<0);
669 pcie_link_status
|= 1<<0;
670 RALINK_PCI_PCIMSK_ADDR
|= (1<<20); // enable pcie1 interrupt
673 #if defined (CONFIG_PCIE_PORT1)
674 if(( RALINK_PCI1_STATUS
& 0x1) == 0)
676 printk("PCIE1 no card, disable it(RST&CLK)\n");
677 ASSERT_SYSRST_PCIE(RALINK_PCIE1_RST
);
678 RALINK_CLKCFG1
= (RALINK_CLKCFG1
& ~RALINK_PCIE1_CLK_EN
);
679 pcie_link_status
&= ~(1<<1);
681 pcie_link_status
|= 1<<1;
682 RALINK_PCI_PCIMSK_ADDR
|= (1<<21); // enable pcie1 interrupt
685 #if defined (CONFIG_PCIE_PORT2)
686 if (( RALINK_PCI2_STATUS
& 0x1) == 0) {
687 printk("PCIE2 no card, disable it(RST&CLK)\n");
688 ASSERT_SYSRST_PCIE(RALINK_PCIE2_RST
);
689 RALINK_CLKCFG1
= (RALINK_CLKCFG1
& ~RALINK_PCIE2_CLK_EN
);
690 pcie_link_status
&= ~(1<<2);
692 pcie_link_status
|= 1<<2;
693 RALINK_PCI_PCIMSK_ADDR
|= (1<<22); // enable pcie2 interrupt
696 if (pcie_link_status
== 0)
700 pcie(2/1/0) link status pcie2_num pcie1_num pcie0_num
710 switch(pcie_link_status
) {
712 RALINK_PCI_PCICFG_ADDR
&= ~0x00ff0000;
713 RALINK_PCI_PCICFG_ADDR
|= 0x1 << 16; //port0
714 RALINK_PCI_PCICFG_ADDR
|= 0x0 << 20; //port1
717 RALINK_PCI_PCICFG_ADDR
&= ~0x0fff0000;
718 RALINK_PCI_PCICFG_ADDR
|= 0x1 << 16; //port0
719 RALINK_PCI_PCICFG_ADDR
|= 0x2 << 20; //port1
720 RALINK_PCI_PCICFG_ADDR
|= 0x0 << 24; //port2
723 RALINK_PCI_PCICFG_ADDR
&= ~0x0fff0000;
724 RALINK_PCI_PCICFG_ADDR
|= 0x0 << 16; //port0
725 RALINK_PCI_PCICFG_ADDR
|= 0x2 << 20; //port1
726 RALINK_PCI_PCICFG_ADDR
|= 0x1 << 24; //port2
729 RALINK_PCI_PCICFG_ADDR
&= ~0x0fff0000;
730 RALINK_PCI_PCICFG_ADDR
|= 0x2 << 16; //port0
731 RALINK_PCI_PCICFG_ADDR
|= 0x0 << 20; //port1
732 RALINK_PCI_PCICFG_ADDR
|= 0x1 << 24; //port2
735 printk(" -> %x\n", RALINK_PCI_PCICFG_ADDR
);
736 //printk(" RALINK_PCI_ARBCTL = %x\n", RALINK_PCI_ARBCTL);
739 ioport_resource.start = mt7621_res_pci_io1.start;
740 ioport_resource.end = mt7621_res_pci_io1.end;
743 RALINK_PCI_MEMBASE
= 0xffffffff; //RALINK_PCI_MM_MAP_BASE;
744 RALINK_PCI_IOBASE
= RALINK_PCI_IO_MAP_BASE
;
746 #if defined (CONFIG_PCIE_PORT0)
748 if((pcie_link_status
& 0x1) != 0) {
749 RALINK_PCI0_BAR0SETUP_ADDR
= 0x7FFF0001; //open 7FFF:2G; ENABLE
750 RALINK_PCI0_IMBASEBAR0_ADDR
= MEMORY_BASE
;
751 RALINK_PCI0_CLASS
= 0x06040001;
752 printk("PCIE0 enabled\n");
755 #if defined (CONFIG_PCIE_PORT1)
757 if ((pcie_link_status
& 0x2) != 0) {
758 RALINK_PCI1_BAR0SETUP_ADDR
= 0x7FFF0001; //open 7FFF:2G; ENABLE
759 RALINK_PCI1_IMBASEBAR0_ADDR
= MEMORY_BASE
;
760 RALINK_PCI1_CLASS
= 0x06040001;
761 printk("PCIE1 enabled\n");
764 #if defined (CONFIG_PCIE_PORT2)
766 if ((pcie_link_status
& 0x4) != 0) {
767 RALINK_PCI2_BAR0SETUP_ADDR
= 0x7FFF0001; //open 7FFF:2G; ENABLE
768 RALINK_PCI2_IMBASEBAR0_ADDR
= MEMORY_BASE
;
769 RALINK_PCI2_CLASS
= 0x06040001;
770 printk("PCIE2 enabled\n");
775 switch(pcie_link_status
) {
777 read_config(0, 2, 0, 0x4, &val
);
778 write_config(0, 2, 0, 0x4, val
|0x4);
779 // write_config(0, 1, 0, 0x4, val|0x7);
780 read_config(0, 2, 0, 0x70c, &val
);
783 write_config(0, 2, 0, 0x70c, val
);
787 read_config(0, 1, 0, 0x4, &val
);
788 write_config(0, 1, 0, 0x4, val
|0x4);
789 // write_config(0, 1, 0, 0x4, val|0x7);
790 read_config(0, 1, 0, 0x70c, &val
);
793 write_config(0, 1, 0, 0x70c, val
);
795 read_config(0, 0, 0, 0x4, &val
);
796 write_config(0, 0, 0, 0x4, val
|0x4); //bus master enable
797 // write_config(0, 0, 0, 0x4, val|0x7); //bus master enable
798 read_config(0, 0, 0, 0x70c, &val
);
801 write_config(0, 0, 0, 0x70c, val
);
804 pci_load_of_ranges(&mt7621_controller
, pdev
->dev
.of_node
);
805 setup_cm_memory_region(mt7621_controller
.mem_resource
);
806 register_pci_controller(&mt7621_controller
);
811 int pcibios_plat_dev_init(struct pci_dev
*dev
)
816 static const struct of_device_id mt7621_pci_ids
[] = {
817 { .compatible
= "mediatek,mt7621-pci" },
820 MODULE_DEVICE_TABLE(of
, mt7621_pci_ids
);
822 static struct platform_driver mt7621_pci_driver
= {
823 .probe
= mt7621_pci_probe
,
825 .name
= "mt7621-pci",
826 .of_match_table
= of_match_ptr(mt7621_pci_ids
),
830 static int __init
mt7621_pci_init(void)
832 return platform_driver_register(&mt7621_pci_driver
);
835 arch_initcall(mt7621_pci_init
);