| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/kernel.h> |
| #include <linux/sizes.h> |
| |
| #include "ddk750_reg.h" |
| #include "ddk750_chip.h" |
| #include "ddk750_power.h" |
| |
| #define MHz(x) ((x) * 1000000) |
| |
| static enum logical_chip_type chip; |
| |
| enum logical_chip_type sm750_get_chip_type(void) |
| { |
| return chip; |
| } |
| |
| void sm750_set_chip_type(unsigned short dev_id, u8 rev_id) |
| { |
| if (dev_id == 0x718) { |
| chip = SM718; |
| } else if (dev_id == 0x750) { |
| chip = SM750; |
| /* SM750 and SM750LE are different in their revision ID only. */ |
| if (rev_id == SM750LE_REVISION_ID) { |
| chip = SM750LE; |
| pr_info("found sm750le\n"); |
| } |
| } else { |
| chip = SM_UNKNOWN; |
| } |
| } |
| |
| static unsigned int get_mxclk_freq(void) |
| { |
| unsigned int pll_reg; |
| unsigned int M, N, OD, POD; |
| |
| if (sm750_get_chip_type() == SM750LE) |
| return MHz(130); |
| |
| pll_reg = peek32(MXCLK_PLL_CTRL); |
| M = (pll_reg & PLL_CTRL_M_MASK) >> PLL_CTRL_M_SHIFT; |
| N = (pll_reg & PLL_CTRL_N_MASK) >> PLL_CTRL_N_SHIFT; |
| OD = (pll_reg & PLL_CTRL_OD_MASK) >> PLL_CTRL_OD_SHIFT; |
| POD = (pll_reg & PLL_CTRL_POD_MASK) >> PLL_CTRL_POD_SHIFT; |
| |
| return DEFAULT_INPUT_CLOCK * M / N / BIT(OD) / BIT(POD); |
| } |
| |
| /* |
| * This function set up the main chip clock. |
| * |
| * Input: Frequency to be set. |
| */ |
| static void set_chip_clock(unsigned int frequency) |
| { |
| struct pll_value pll; |
| unsigned int actual_mx_clk; |
| |
| /* Cheok_0509: For SM750LE, the chip clock is fixed. Nothing to set. */ |
| if (sm750_get_chip_type() == SM750LE) |
| return; |
| |
| if (frequency) { |
| /* |
| * Set up PLL structure to hold the value to be set in clocks. |
| */ |
| pll.inputFreq = DEFAULT_INPUT_CLOCK; /* Defined in CLOCK.H */ |
| pll.clockType = MXCLK_PLL; |
| |
| /* |
| * Call sm750_calc_pll_value() to fill the other fields |
| * of the PLL structure. Sometimes, the chip cannot set |
| * up the exact clock required by the User. |
| * Return value of sm750_calc_pll_value gives the actual |
| * possible clock. |
| */ |
| actual_mx_clk = sm750_calc_pll_value(frequency, &pll); |
| |
| /* Master Clock Control: MXCLK_PLL */ |
| poke32(MXCLK_PLL_CTRL, sm750_format_pll_reg(&pll)); |
| } |
| } |
| |
| static void set_memory_clock(unsigned int frequency) |
| { |
| unsigned int reg, divisor; |
| |
| /* |
| * Cheok_0509: For SM750LE, the memory clock is fixed. |
| * Nothing to set. |
| */ |
| if (sm750_get_chip_type() == SM750LE) |
| return; |
| |
| if (frequency) { |
| /* |
| * Set the frequency to the maximum frequency |
| * that the DDR Memory can take which is 336MHz. |
| */ |
| if (frequency > MHz(336)) |
| frequency = MHz(336); |
| |
| /* Calculate the divisor */ |
| divisor = DIV_ROUND_CLOSEST(get_mxclk_freq(), frequency); |
| |
| /* Set the corresponding divisor in the register. */ |
| reg = peek32(CURRENT_GATE) & ~CURRENT_GATE_M2XCLK_MASK; |
| switch (divisor) { |
| default: |
| case 1: |
| reg |= CURRENT_GATE_M2XCLK_DIV_1; |
| break; |
| case 2: |
| reg |= CURRENT_GATE_M2XCLK_DIV_2; |
| break; |
| case 3: |
| reg |= CURRENT_GATE_M2XCLK_DIV_3; |
| break; |
| case 4: |
| reg |= CURRENT_GATE_M2XCLK_DIV_4; |
| break; |
| } |
| |
| sm750_set_current_gate(reg); |
| } |
| } |
| |
| /* |
| * This function set up the master clock (MCLK). |
| * |
| * Input: Frequency to be set. |
| * |
| * NOTE: |
| * The maximum frequency the engine can run is 168MHz. |
| */ |
| static void set_master_clock(unsigned int frequency) |
| { |
| unsigned int reg, divisor; |
| |
| /* |
| * Cheok_0509: For SM750LE, the memory clock is fixed. |
| * Nothing to set. |
| */ |
| if (sm750_get_chip_type() == SM750LE) |
| return; |
| |
| if (frequency) { |
| /* |
| * Set the frequency to the maximum frequency |
| * that the SM750 engine can run, which is about 190 MHz. |
| */ |
| if (frequency > MHz(190)) |
| frequency = MHz(190); |
| |
| /* Calculate the divisor */ |
| divisor = DIV_ROUND_CLOSEST(get_mxclk_freq(), frequency); |
| |
| /* Set the corresponding divisor in the register. */ |
| reg = peek32(CURRENT_GATE) & ~CURRENT_GATE_MCLK_MASK; |
| switch (divisor) { |
| default: |
| case 3: |
| reg |= CURRENT_GATE_MCLK_DIV_3; |
| break; |
| case 4: |
| reg |= CURRENT_GATE_MCLK_DIV_4; |
| break; |
| case 6: |
| reg |= CURRENT_GATE_MCLK_DIV_6; |
| break; |
| case 8: |
| reg |= CURRENT_GATE_MCLK_DIV_8; |
| break; |
| } |
| |
| sm750_set_current_gate(reg); |
| } |
| } |
| |
| unsigned int ddk750_get_vm_size(void) |
| { |
| unsigned int reg; |
| unsigned int data; |
| |
| /* sm750le only use 64 mb memory*/ |
| if (sm750_get_chip_type() == SM750LE) |
| return SZ_64M; |
| |
| /* for 750,always use power mode0*/ |
| reg = peek32(MODE0_GATE); |
| reg |= MODE0_GATE_GPIO; |
| poke32(MODE0_GATE, reg); |
| |
| /* get frame buffer size from GPIO */ |
| reg = peek32(MISC_CTRL) & MISC_CTRL_LOCALMEM_SIZE_MASK; |
| switch (reg) { |
| case MISC_CTRL_LOCALMEM_SIZE_8M: |
| data = SZ_8M; break; /* 8 Mega byte */ |
| case MISC_CTRL_LOCALMEM_SIZE_16M: |
| data = SZ_16M; break; /* 16 Mega byte */ |
| case MISC_CTRL_LOCALMEM_SIZE_32M: |
| data = SZ_32M; break; /* 32 Mega byte */ |
| case MISC_CTRL_LOCALMEM_SIZE_64M: |
| data = SZ_64M; break; /* 64 Mega byte */ |
| default: |
| data = 0; |
| break; |
| } |
| return data; |
| } |
| |
| int ddk750_init_hw(struct initchip_param *pInitParam) |
| { |
| unsigned int reg; |
| |
| if (pInitParam->powerMode != 0) |
| pInitParam->powerMode = 0; |
| sm750_set_power_mode(pInitParam->powerMode); |
| |
| /* Enable display power gate & LOCALMEM power gate*/ |
| reg = peek32(CURRENT_GATE); |
| reg |= (CURRENT_GATE_DISPLAY | CURRENT_GATE_LOCALMEM); |
| sm750_set_current_gate(reg); |
| |
| if (sm750_get_chip_type() != SM750LE) { |
| /* set panel pll and graphic mode via mmio_88 */ |
| reg = peek32(VGA_CONFIGURATION); |
| reg |= (VGA_CONFIGURATION_PLL | VGA_CONFIGURATION_MODE); |
| poke32(VGA_CONFIGURATION, reg); |
| } else { |
| #if defined(__i386__) || defined(__x86_64__) |
| /* set graphic mode via IO method */ |
| outb_p(0x88, 0x3d4); |
| outb_p(0x06, 0x3d5); |
| #endif |
| } |
| |
| /* Set the Main Chip Clock */ |
| set_chip_clock(MHz((unsigned int)pInitParam->chipClock)); |
| |
| /* Set up memory clock. */ |
| set_memory_clock(MHz(pInitParam->memClock)); |
| |
| /* Set up master clock */ |
| set_master_clock(MHz(pInitParam->masterClock)); |
| |
| /* |
| * Reset the memory controller. |
| * If the memory controller is not reset in SM750, |
| * the system might hang when sw accesses the memory. |
| * The memory should be resetted after changing the MXCLK. |
| */ |
| if (pInitParam->resetMemory == 1) { |
| reg = peek32(MISC_CTRL); |
| reg &= ~MISC_CTRL_LOCALMEM_RESET; |
| poke32(MISC_CTRL, reg); |
| |
| reg |= MISC_CTRL_LOCALMEM_RESET; |
| poke32(MISC_CTRL, reg); |
| } |
| |
| if (pInitParam->setAllEngOff == 1) { |
| sm750_enable_2d_engine(0); |
| |
| /* Disable Overlay, if a former application left it on */ |
| reg = peek32(VIDEO_DISPLAY_CTRL); |
| reg &= ~DISPLAY_CTRL_PLANE; |
| poke32(VIDEO_DISPLAY_CTRL, reg); |
| |
| /* Disable video alpha, if a former application left it on */ |
| reg = peek32(VIDEO_ALPHA_DISPLAY_CTRL); |
| reg &= ~DISPLAY_CTRL_PLANE; |
| poke32(VIDEO_ALPHA_DISPLAY_CTRL, reg); |
| |
| /* Disable alpha plane, if a former application left it on */ |
| reg = peek32(ALPHA_DISPLAY_CTRL); |
| reg &= ~DISPLAY_CTRL_PLANE; |
| poke32(ALPHA_DISPLAY_CTRL, reg); |
| |
| /* Disable DMA Channel, if a former application left it on */ |
| reg = peek32(DMA_ABORT_INTERRUPT); |
| reg |= DMA_ABORT_INTERRUPT_ABORT_1; |
| poke32(DMA_ABORT_INTERRUPT, reg); |
| |
| /* Disable DMA Power, if a former application left it on */ |
| sm750_enable_dma(0); |
| } |
| |
| /* We can add more initialization as needed. */ |
| |
| return 0; |
| } |
| |
| /* |
| * monk liu @ 4/6/2011: |
| * re-write the calculatePLL function of ddk750. |
| * the original version function does not use |
| * some mathematics tricks and shortcut |
| * when it doing the calculation of the best N,M,D combination |
| * I think this version gives a little upgrade in speed |
| * |
| * 750 pll clock formular: |
| * Request Clock = (Input Clock * M )/(N * X) |
| * |
| * Input Clock = 14318181 hz |
| * X = 2 power D |
| * D ={0,1,2,3,4,5,6} |
| * M = {1,...,255} |
| * N = {2,...,15} |
| */ |
| unsigned int sm750_calc_pll_value(unsigned int request_orig, |
| struct pll_value *pll) |
| { |
| /* |
| * as sm750 register definition, |
| * N located in 2,15 and M located in 1,255 |
| */ |
| int N, M, X, d; |
| int mini_diff; |
| unsigned int RN, quo, rem, fl_quo; |
| unsigned int input, request; |
| unsigned int tmp_clock, ret; |
| const int max_OD = 3; |
| int max_d = 6; |
| |
| if (sm750_get_chip_type() == SM750LE) { |
| /* |
| * SM750LE don't have |
| * programmable PLL and M/N values to work on. |
| * Just return the requested clock. |
| */ |
| return request_orig; |
| } |
| |
| ret = 0; |
| mini_diff = ~0; |
| request = request_orig / 1000; |
| input = pll->inputFreq / 1000; |
| |
| /* |
| * for MXCLK register, |
| * no POD provided, so need be treated differently |
| */ |
| if (pll->clockType == MXCLK_PLL) |
| max_d = 3; |
| |
| for (N = 15; N > 1; N--) { |
| /* |
| * RN will not exceed maximum long |
| * if @request <= 285 MHZ (for 32bit cpu) |
| */ |
| RN = N * request; |
| quo = RN / input; |
| rem = RN % input;/* rem always small than 14318181 */ |
| fl_quo = rem * 10000 / input; |
| |
| for (d = max_d; d >= 0; d--) { |
| X = BIT(d); |
| M = quo * X; |
| M += fl_quo * X / 10000; |
| /* round step */ |
| M += (fl_quo * X % 10000) > 5000 ? 1 : 0; |
| if (M < 256 && M > 0) { |
| unsigned int diff; |
| |
| tmp_clock = pll->inputFreq * M / N / X; |
| diff = abs(tmp_clock - request_orig); |
| if (diff < mini_diff) { |
| pll->M = M; |
| pll->N = N; |
| pll->POD = 0; |
| if (d > max_OD) |
| pll->POD = d - max_OD; |
| pll->OD = d - pll->POD; |
| mini_diff = diff; |
| ret = tmp_clock; |
| } |
| } |
| } |
| } |
| return ret; |
| } |
| |
| unsigned int sm750_format_pll_reg(struct pll_value *pPLL) |
| { |
| #ifndef VALIDATION_CHIP |
| unsigned int POD = pPLL->POD; |
| #endif |
| unsigned int OD = pPLL->OD; |
| unsigned int M = pPLL->M; |
| unsigned int N = pPLL->N; |
| |
| /* |
| * Note that all PLL's have the same format. Here, we just use |
| * Panel PLL parameter to work out the bit fields in the |
| * register. On returning a 32 bit number, the value can be |
| * applied to any PLL in the calling function. |
| */ |
| return PLL_CTRL_POWER | |
| #ifndef VALIDATION_CHIP |
| ((POD << PLL_CTRL_POD_SHIFT) & PLL_CTRL_POD_MASK) | |
| #endif |
| ((OD << PLL_CTRL_OD_SHIFT) & PLL_CTRL_OD_MASK) | |
| ((N << PLL_CTRL_N_SHIFT) & PLL_CTRL_N_MASK) | |
| ((M << PLL_CTRL_M_SHIFT) & PLL_CTRL_M_MASK); |
| } |